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8615933c
编写于
12月 27, 2021
作者:
ToTensor
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
optimize 15 exercises
上级
14acb73a
变更
15
显示空白变更内容
内联
并排
Showing
15 changed file
with
1030 addition
and
163 deletion
+1030
-163
data/3.dailycode高阶/1.cpp/11.exercises/solution.md
data/3.dailycode高阶/1.cpp/11.exercises/solution.md
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data/3.dailycode高阶/1.cpp/12.exercises/solution.md
data/3.dailycode高阶/1.cpp/12.exercises/solution.md
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-4
data/3.dailycode高阶/1.cpp/13.exercises/solution.md
data/3.dailycode高阶/1.cpp/13.exercises/solution.md
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data/3.dailycode高阶/1.cpp/14.exercises/solution.md
data/3.dailycode高阶/1.cpp/14.exercises/solution.md
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data/3.dailycode高阶/1.cpp/15.exercises/solution.md
data/3.dailycode高阶/1.cpp/15.exercises/solution.md
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data/3.dailycode高阶/1.cpp/16.exercises/solution.md
data/3.dailycode高阶/1.cpp/16.exercises/solution.md
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data/3.dailycode高阶/1.cpp/17.exercises/solution.md
data/3.dailycode高阶/1.cpp/17.exercises/solution.md
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data/3.dailycode高阶/1.cpp/18.exercises/solution.md
data/3.dailycode高阶/1.cpp/18.exercises/solution.md
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data/3.dailycode高阶/1.cpp/19.exercises/solution.md
data/3.dailycode高阶/1.cpp/19.exercises/solution.md
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data/3.dailycode高阶/1.cpp/20.exercises/solution.md
data/3.dailycode高阶/1.cpp/20.exercises/solution.md
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data/3.dailycode高阶/1.cpp/21.exercises/solution.md
data/3.dailycode高阶/1.cpp/21.exercises/solution.md
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data/3.dailycode高阶/1.cpp/22.exercises/solution.md
data/3.dailycode高阶/1.cpp/22.exercises/solution.md
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data/3.dailycode高阶/1.cpp/23.exercises/solution.md
data/3.dailycode高阶/1.cpp/23.exercises/solution.md
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data/3.dailycode高阶/1.cpp/24.exercises/solution.md
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data/3.dailycode高阶/1.cpp/25.exercises/solution.md
data/3.dailycode高阶/1.cpp/25.exercises/solution.md
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未找到文件。
data/3.dailycode高阶/1.cpp/11.exercises/solution.md
浏览文件 @
8615933c
...
...
@@ -26,29 +26,68 @@
2
```
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <iostream>
using
namespace
std
;
int
main
()
{
int
n
=
0
;
cin
>>
n
;
int
*
ptr
=
new
(
nothrow
)
int
[
n
];
for
(
auto
i
=
0
;
i
<
n
;
i
++
)
{
cin
>>
ptr
[
i
];
}
int
x
=
0
;
cin
>>
x
;
auto
j
=
0
;
auto
status
=
0
;
for
(;
j
<
n
;
++
j
)
{
______________
}
if
(
status
==
0
)
{
j
=
-
1
;
}
cout
<<
j
<<
endl
;
delete
[]
ptr
;
cin
.
get
();
cin
.
get
();
return
0
;
}
```
## template
```
cpp
#include <iostream>
using
namespace
std
;
int
main
()
{
int
main
()
{
int
n
=
0
;
cin
>>
n
;
int
*
ptr
=
new
(
nothrow
)
int
[
n
];
for
(
auto
i
=
0
;
i
<
n
;
i
++
)
{
int
*
ptr
=
new
(
nothrow
)
int
[
n
];
for
(
auto
i
=
0
;
i
<
n
;
i
++
)
{
cin
>>
ptr
[
i
];
}
int
x
=
0
;
cin
>>
x
;
auto
j
=
0
;
auto
status
=
0
;
for
(;
j
<
n
;
++
j
)
{
if
(
ptr
[
j
]
==
x
)
{
for
(;
j
<
n
;
++
j
)
{
if
(
ptr
[
j
]
==
x
)
{
status
=
1
;
break
;
}
}
if
(
status
==
0
)
{
if
(
status
==
0
)
{
j
=
-
1
;
}
cout
<<
j
<<
endl
;
...
...
@@ -62,7 +101,11 @@ int main() {
## 答案
```
cpp
if
(
ptr
[
j
]
==
x
)
{
status
=
1
;
break
;
}
```
## 选项
...
...
@@ -70,17 +113,29 @@ int main() {
### A
```
cpp
if
(
ptr
[
j
]
==
x
)
{
status
=
1
;
continue
;
}
```
### B
```
cpp
if
(
ptr
[
j
]
>=
x
)
{
status
=
1
;
continue
;
}
```
### C
```
cpp
if
(
ptr
[
j
]
<=
x
)
{
status
=
1
;
continue
;
}
```
\ No newline at end of file
data/3.dailycode高阶/1.cpp/12.exercises/solution.md
浏览文件 @
8615933c
...
...
@@ -2,6 +2,25 @@
<p
style=
"margin-left:0pt; margin-right:0pt"
>
Ø 问题描述
:
已知一只家禽得了流感
,
流感的传播时间为 24 小时
,
在这 24 小时内最多能将流感传给其它 M 只家禽
,
农场主需要购买紧急药品
,
假设发现时已经过了 N 天
,
那么农场主需要至少买多少包药呢
?(
一包药为一只家禽用量
)
</p><p
style=
"margin-left:0pt; margin-right:0pt"
>
Ø 输入
:
一行
,
两个整数
,
第一个表示流感传染家禽的数量 M
,
第二个表示发现时已过的天数。
</p><p
style=
"margin-left:0pt; margin-right:0pt"
>
Ø 输出
:
一行
,
一个整数
,
表示需要药的包数。
</p><p
style=
"margin-left:0pt; margin-right:0pt"
>
Ø 样例输入
:
</p><p
style=
"margin-left:0pt; margin-right:0pt"
>
10 2
</p><p
style=
"margin-left:0pt; margin-right:0pt"
>
Ø 样例输出
:
</p><p
style=
"margin-left:0pt; margin-right:0pt"
>
121
</p>
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <iostream>
using
namespace
std
;
int
total
(
int
x
);
int
m
;
int
main
()
{
int
x
;
cin
>>
m
>>
x
;
int
to
=
total
(
x
);
cout
<<
to
;
return
0
;
}
int
total
(
int
x
)
{
_________________
}
```
## template
```
cpp
...
...
@@ -28,7 +47,11 @@ int total(int x) {
## 答案
```
cpp
if
(
x
>
0
)
{
return
(
m
+
1
)
*
total
(
x
-
1
);
}
else
return
1
;
```
## 选项
...
...
@@ -36,17 +59,29 @@ int total(int x) {
### A
```
cpp
if
(
x
<
0
)
{
return
(
m
+
1
)
*
total
(
x
-
1
);
}
else
return
1
;
```
### B
```
cpp
if
(
x
>
0
)
{
return
(
m
+
1
)
*
total
(
x
+
1
);
}
else
return
1
;
```
### C
```
cpp
if
(
x
<
0
)
{
return
(
m
+
1
)
*
total
(
x
+
1
);
}
else
return
1
;
```
\ No newline at end of file
data/3.dailycode高阶/1.cpp/13.exercises/solution.md
浏览文件 @
8615933c
...
...
@@ -9,6 +9,45 @@
样例输出
Positive elegance
</p>
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <stdio.h>
#include <string.h>
int
main
()
{
char
a
[
100
]
=
{
0
};
int
i
;
int
zyy
=
1
;
int
fyy
=
1
;
printf
(
"请输入字符串:"
);
gets
(
a
);
for
(
i
=
1
;
i
<
strlen
(
a
);
i
++
)
{
if
(
a
[
i
]
<
a
[
i
-
1
])
{
zyy
=
0
;
break
;
}
}
for
(
i
=
1
;
i
<
strlen
(
a
);
i
++
)
{
________________
}
if
(
zyy
&&
!
fyy
)
{
printf
(
"Positive elegance
\n
"
);
}
else
if
(
!
zyy
&&
fyy
)
{
printf
(
"Negative elegance
\n
"
);
}
else
printf
(
"Non elegance
\n
"
);
return
0
;
}
```
## template
```
cpp
...
...
@@ -22,17 +61,17 @@ int main()
int
fyy
=
1
;
printf
(
"请输入字符串:"
);
gets
(
a
);
for
(
i
=
1
;
i
<
strlen
(
a
);
i
++
)
for
(
i
=
1
;
i
<
strlen
(
a
);
i
++
)
{
if
(
a
[
i
]
<
a
[
i
-
1
])
if
(
a
[
i
]
<
a
[
i
-
1
])
{
zyy
=
0
;
break
;
}
}
for
(
i
=
1
;
i
<
strlen
(
a
);
i
++
)
for
(
i
=
1
;
i
<
strlen
(
a
);
i
++
)
{
if
(
a
[
i
]
>
a
[
i
-
1
])
if
(
a
[
i
]
>
a
[
i
-
1
])
{
fyy
=
0
;
break
;
...
...
@@ -41,10 +80,12 @@ int main()
if
(
zyy
&&
!
fyy
)
{
printf
(
"Positive elegance
\n
"
);
}
else
if
(
!
zyy
&&
fyy
)
}
else
if
(
!
zyy
&&
fyy
)
{
printf
(
"Negative elegance
\n
"
);
}
else
}
else
printf
(
"Non elegance
\n
"
);
return
0
;
}
...
...
@@ -53,7 +94,11 @@ int main()
## 答案
```
cpp
if
(
a
[
i
]
>
a
[
i
-
1
])
{
fyy
=
0
;
break
;
}
```
## 选项
...
...
@@ -61,17 +106,29 @@ int main()
### A
```
cpp
if
(
a
[
i
]
<
a
[
i
-
1
])
{
fyy
=
0
;
break
;
}
```
### B
```
cpp
if
(
a
[
i
]
<=
a
[
i
-
1
])
{
fyy
=
0
;
break
;
}
```
### C
```
cpp
if
(
a
[
i
]
>
a
[
i
-
1
])
{
fyy
=
0
;
continue
;
}
```
\ No newline at end of file
data/3.dailycode高阶/1.cpp/14.exercises/solution.md
浏览文件 @
8615933c
...
...
@@ -20,6 +20,34 @@
输出格式
对于每一个询问
,
输出一行包含
"
Case #x: y
",
x是询问编号
(
从1开始标号
),
y是你每天最少需要的盒子数量。
</p>
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include<iostream>
#include<cmath>
using
namespace
std
;
int
main
()
{
int
n
,
k
,
count
=
1
;
long
long
c
;
cin
>>
n
;
while
(
n
--
)
{
cin
>>
k
>>
c
;
int
num
=
k
;
long
long
sum
=
k
;
for
(
long
long
i
=
2
;
i
<=
c
;
i
=
sum
/
k
+
1
)
{
int
t
=
num
;
________________
}
cout
<<
"Case #"
<<
count
++
<<
": "
<<
num
<<
endl
;
}
return
0
;
}
```
## template
```
cpp
...
...
@@ -51,7 +79,8 @@ int main()
## 答案
```
cpp
num
+=
ceil
((
k
*
i
-
sum
)
*
1.0
/
i
);
sum
+=
i
*
(
num
-
t
);
```
## 选项
...
...
@@ -59,17 +88,20 @@ int main()
### A
```
cpp
num
+=
ceil
((
k
*
i
-
sum
)
*
1.0
/
i
);
sum
+=
i
*
(
num
+
t
);
```
### B
```
cpp
num
+=
ceil
((
k
-
sum
)
*
1.0
/
i
);
sum
+=
i
*
(
num
-
t
);
```
### C
```
cpp
num
+=
ceil
((
k
*
(
i
-
sum
))
*
1.0
/
i
);
sum
+=
i
*
(
num
+
t
);
```
\ No newline at end of file
data/3.dailycode高阶/1.cpp/15.exercises/solution.md
浏览文件 @
8615933c
# 寻找孪生素数
数学家希尔伯特在1900年国际数学家大会的报告上提出一个“孪生素数猜想”,即: 存在无穷多个素数p,使得p + 2是素数。p和p+2这一对差为2的素数,被称为“孪生素数”。
看起来,这个猜想是成立的,我们总能找到很多对孪生素数,例如:3和5,5和7,11和13…… 这一猜想至今还未被证明。
现在,对于给定的整数n, 请寻找大于n的最小的一对孪生素数p和q(q=p+2)。
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <cmath>
#include <iostream>
using
namespace
std
;
int
sushu
(
int
x
)
{
if
(
x
<=
1
)
return
0
;
int
i
,
j
=
1
;
for
(
i
=
2
;
i
<=
sqrt
(
x
);
i
++
)
{
_______________
}
return
j
;
}
int
main
()
{
int
x
;
cin
>>
x
;
int
i
=
x
+
1
;
for
(;;
i
++
)
{
if
(
sushu
(
i
)
&&
sushu
(
i
+
2
))
break
;
}
cout
<<
i
<<
' '
<<
i
+
2
;
return
0
;
}
```
## template
```
cpp
...
...
@@ -12,25 +46,30 @@
using
namespace
std
;
int
sushu
(
int
x
)
{
if
(
x
<=
1
)
return
0
;
int
i
,
j
=
1
;
for
(
i
=
2
;
i
<=
sqrt
(
x
);
i
++
)
if
(
x
<=
1
)
return
0
;
int
i
,
j
=
1
;
for
(
i
=
2
;
i
<=
sqrt
(
x
);
i
++
)
{
if
(
x
%
i
==
0
)
{
if
(
x
%
i
==
0
){
j
=
0
;
break
;}
j
=
0
;
break
;
}
}
return
j
;
}
int
main
()
{
int
x
;
cin
>>
x
;
int
i
=
x
+
1
;
for
(;;
i
++
)
cin
>>
x
;
int
i
=
x
+
1
;
for
(;;
i
++
)
{
if
(
sushu
(
i
)
&&
sushu
(
i
+
2
))
if
(
sushu
(
i
)
&&
sushu
(
i
+
2
))
break
;
}
cout
<<
i
<<
' '
<<
i
+
2
;
cout
<<
i
<<
' '
<<
i
+
2
;
return
0
;
}
```
...
...
@@ -38,7 +77,11 @@ int main()
## 答案
```
cpp
if
(
x
%
i
==
0
)
{
j
=
0
;
break
;
}
```
## 选项
...
...
@@ -46,17 +89,29 @@ int main()
### A
```
cpp
if
(
x
%
i
==
0
)
{
j
=
0
;
continue
;
}
```
### B
```
cpp
if
(
x
%
i
==
1
)
{
j
=
0
;
break
;
}
```
### C
```
cpp
if
(
x
%
i
==
1
)
{
j
=
0
;
continue
;
}
```
\ No newline at end of file
data/3.dailycode高阶/1.cpp/16.exercises/solution.md
浏览文件 @
8615933c
# 有序表的折半查找
问题描述:
**问题描述:**
用有序表表示静态查找表时,通常检索函数可以用折半查找来实现。
折半查找的查找过程是:首先确定待查记录所在的范围,然后逐步缩小范围直到找到或者确定找不到相应的记录为止。而每次需要缩小的范围均为上一次的一半,这样的查找过程可以被称为折半查找。
第二行包含n个用空格隔开的正整数,表示n个有序的整数。输入保证这n个整数是从小到大递增的。
第三行包含k个用空格隔开的正整数,表示k次查询的目标。
输出:
**输出:**
只有1行,包含k个整数,分别表示每一次的查询结果。如果在查询中找到了对应的整数,则输出其相应的位置,否则输出-1。
请在每个整数后输出一个空格,并请注意行尾输出换行。
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <stdio.h>
int
binary
(
int
*
a
,
int
key
,
int
n
)
{
int
left
=
0
,
right
=
n
-
1
,
mid
=
0
;
mid
=
(
left
+
right
)
/
2
;
while
(
left
<
right
&&
a
[
mid
]
!=
key
)
{
_________________
}
if
(
a
[
mid
]
==
key
)
return
mid
;
return
-
1
;
}
int
main
(
void
)
{
int
Base_a
[
20
]
=
{
1
,
3
,
5
,
8
,
9
,
40
,
120
,
123
,
125
,
150
,
199
,
200
,
1250
,
1255
,
1900
,
2000
,
2001
,
3000
,
3950
,
5000
};
int
Search_a
[
5
]
=
{
12
,
199
,
9
,
2001
,
3500
};
int
result
=
0x00
;
for
(
int
i
=
0
;
i
<
sizeof
(
Search_a
)
/
sizeof
(
Search_a
[
0
]);
i
++
)
{
result
=
binary
(
Base_a
,
Search_a
[
i
],
sizeof
(
Base_a
)
/
sizeof
(
Base_a
[
0
]));
printf
(
"[%d %d] "
,
Search_a
[
i
],
result
);
}
printf
(
"
\n
"
);
return
0
;
}
```
## template
```
cpp
#include <stdio.h>
int
binary
(
int
*
a
,
int
key
,
int
n
)
int
binary
(
int
*
a
,
int
key
,
int
n
)
{
int
left
=
0
,
right
=
n
-
1
,
mid
=
0
;
mid
=
(
left
+
right
)
/
2
;
while
(
left
<
right
&&
a
[
mid
]
!=
key
)
mid
=
(
left
+
right
)
/
2
;
while
(
left
<
right
&&
a
[
mid
]
!=
key
)
{
if
(
a
[
mid
]
<
key
)
if
(
a
[
mid
]
<
key
)
left
=
mid
+
1
;
else
if
(
a
[
mid
]
>
key
)
else
if
(
a
[
mid
]
>
key
)
right
=
mid
-
1
;
mid
=
(
left
+
right
)
/
2
;
mid
=
(
left
+
right
)
/
2
;
}
if
(
a
[
mid
]
==
key
)
return
mid
;
if
(
a
[
mid
]
==
key
)
return
mid
;
return
-
1
;
}
int
main
(
void
)
int
main
(
void
)
{
int
Base_a
[
20
]
=
{
1
,
3
,
5
,
8
,
9
,
40
,
120
,
123
,
125
,
150
,
199
,
200
,
1250
,
1255
,
1900
,
2000
,
2001
,
3000
,
3950
,
5000
};
int
Search_a
[
5
]
=
{
12
,
199
,
9
,
2001
,
3500
};
int
Base_a
[
20
]
=
{
1
,
3
,
5
,
8
,
9
,
40
,
120
,
123
,
125
,
150
,
199
,
200
,
1250
,
1255
,
1900
,
2000
,
2001
,
3000
,
3950
,
5000
};
int
Search_a
[
5
]
=
{
12
,
199
,
9
,
2001
,
3500
};
int
result
=
0x00
;
for
(
int
i
=
0
;
i
<
sizeof
(
Search_a
)
/
sizeof
(
Search_a
[
0
]);
i
++
)
for
(
int
i
=
0
;
i
<
sizeof
(
Search_a
)
/
sizeof
(
Search_a
[
0
]);
i
++
)
{
result
=
binary
(
Base_a
,
Search_a
[
i
],
sizeof
(
Base_a
)
/
sizeof
(
Base_a
[
0
]));
printf
(
"[%d %d] "
,
Search_a
[
i
],
result
);
result
=
binary
(
Base_a
,
Search_a
[
i
],
sizeof
(
Base_a
)
/
sizeof
(
Base_a
[
0
]));
printf
(
"[%d %d] "
,
Search_a
[
i
],
result
);
}
printf
(
"
\n
"
);
return
0
;
...
...
@@ -46,7 +85,11 @@ int main (void)
## 答案
```
cpp
if
(
a
[
mid
]
<
key
)
left
=
mid
+
1
;
else
if
(
a
[
mid
]
>
key
)
right
=
mid
-
1
;
mid
=
(
left
+
right
)
/
2
;
```
## 选项
...
...
@@ -54,17 +97,29 @@ int main (void)
### A
```
cpp
if
(
a
[
mid
]
>
key
)
left
=
mid
+
1
;
else
if
(
a
[
mid
]
<
key
)
right
=
mid
-
1
;
mid
=
(
left
+
right
)
/
2
;
```
### B
```
cpp
if
(
a
[
mid
]
<
key
)
left
=
mid
-
1
;
else
if
(
a
[
mid
]
>
key
)
right
=
mid
+
1
;
mid
=
(
left
+
right
)
/
2
;
```
### C
```
cpp
if
(
a
[
mid
]
<
key
)
left
=
mid
-
1
;
else
if
(
a
[
mid
]
>=
key
)
right
=
mid
+
1
;
mid
=
(
left
+
right
)
/
2
;
```
\ No newline at end of file
data/3.dailycode高阶/1.cpp/17.exercises/solution.md
浏览文件 @
8615933c
# 最优路线
题目描述
**题目描述**
探险队要穿越泥潭,必须选择可踩踏的落脚点。可是泥潭面积很大,落脚点又实在少得可怜,一不小心就会深陷泥潭而无法脱身。侦查员费尽周折才从老乡手里弄到了一份地图,图中标出了落脚点的位置,而且令人震惊的是:泥潭只有一条穿越路线,且对于 n×m 的地图,路线长度为 n+m-1!请编程为探险队找出穿越路线。
输入描述
**输入描述**
两个整数 n 和 m,表示泥潭的长和宽。下面 n 行 m 列表示地形(0 表示泥潭,1 表示落脚点)
输出描述
**输出描述**
用坐标表示穿越路线,坐标之间用 > 分隔
样例输入
**样例输入**
```
json
6
9
1
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
...
...
@@ -14,50 +22,105 @@
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
样例输出
```
**样例输出**
```
json
(
1
,
1
)>(
1
,
2
)>(
1
,
3
)>(
2
,
3
)>(
2
,
4
)>(
2
,
5
)>(
3
,
5
)>(
4
,
5
)>(
4
,
6
)>(
5
,
6
)>(
5
,
7
)>(
5
,
8
)>(
5
,
9
)>(
6
,
9
)
```
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <stdio.h>
#include <string.h>
const
int
N
=
101
;
int
map
[
N
][
N
];
int
n
,
m
;
struct
point
{
int
l
,
r
;
}
node
[
N
];
int
ans
;
void
DFS
(
int
x
,
int
y
)
{
if
(
x
==
n
&&
y
==
m
)
{
for
(
int
i
=
1
;
i
<
ans
;
i
++
)
printf
(
"(%d,%d)>"
,
node
[
i
].
l
,
node
[
i
].
r
);
printf
(
"(%d,%d)
\n
"
,
x
,
y
);
}
else
{
if
(
map
[
x
][
y
]
==
1
&&
x
<=
n
&&
y
<=
m
)
{
node
[
ans
].
l
=
x
;
node
[
ans
].
r
=
y
;
ans
++
;
DFS
(
x
+
1
,
y
);
DFS
(
x
,
y
+
1
);
}
}
}
int
main
()
{
while
(
scanf
(
"%d%d"
,
&
n
,
&
m
)
!=
EOF
)
{
ans
=
1
;
memset
(
map
,
0
,
sizeof
(
map
));
for
(
int
i
=
1
;
i
<=
n
;
i
++
)
for
(
int
j
=
1
;
j
<=
m
;
j
++
)
scanf
(
"%d"
,
&
map
[
i
][
j
]);
DFS
(
1
,
1
);
}
return
0
;
}
```
## template
```
cpp
#include <stdio.h>
#include <string.h>
const
int
N
=
101
;
const
int
N
=
101
;
int
map
[
N
][
N
];
int
n
,
m
;
struct
point
{
int
l
,
r
;
}
node
[
N
];
int
n
,
m
;
struct
point
{
int
l
,
r
;
}
node
[
N
];
int
ans
;
void
DFS
(
int
x
,
int
y
)
void
DFS
(
int
x
,
int
y
)
{
if
(
x
==
n
&&
y
==
m
)
if
(
x
==
n
&&
y
==
m
)
{
for
(
int
i
=
1
;
i
<
ans
;
i
++
)
for
(
int
i
=
1
;
i
<
ans
;
i
++
)
printf
(
"(%d,%d)>"
,
node
[
i
].
l
,
node
[
i
].
r
);
printf
(
"(%d,%d)
\n
"
,
x
,
y
);
}
else
{
if
(
map
[
x
][
y
]
==
1
&&
x
<=
n
&&
y
<=
m
)
else
{
if
(
map
[
x
][
y
]
==
1
&&
x
<=
n
&&
y
<=
m
)
{
node
[
ans
].
l
=
x
;
node
[
ans
].
r
=
y
;
node
[
ans
].
l
=
x
;
node
[
ans
].
r
=
y
;
ans
++
;
DFS
(
x
+
1
,
y
);
DFS
(
x
,
y
+
1
);
DFS
(
x
+
1
,
y
);
DFS
(
x
,
y
+
1
);
}
}
}
int
main
()
{
while
(
scanf
(
"%d%d"
,
&
n
,
&
m
)
!=
EOF
)
while
(
scanf
(
"%d%d"
,
&
n
,
&
m
)
!=
EOF
)
{
ans
=
1
;
memset
(
map
,
0
,
sizeof
(
map
));
for
(
int
i
=
1
;
i
<=
n
;
i
++
)
for
(
int
j
=
1
;
j
<=
m
;
j
++
)
ans
=
1
;
memset
(
map
,
0
,
sizeof
(
map
));
for
(
int
i
=
1
;
i
<=
n
;
i
++
)
for
(
int
j
=
1
;
j
<=
m
;
j
++
)
scanf
(
"%d"
,
&
map
[
i
][
j
]);
DFS
(
1
,
1
);
DFS
(
1
,
1
);
}
return
0
;
}
...
...
data/3.dailycode高阶/1.cpp/18.exercises/solution.md
浏览文件 @
8615933c
...
...
@@ -5,19 +5,52 @@
输出形式
:
保留小数点后两位有效数字;输出从大到小排列
</p>
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <math.h>
#include <stdio.h>
void
paixu
(
float
*
p
,
int
n
)
{
int
i
,
j
;
for
(
i
=
0
;
i
<
n
-
1
;
i
++
)
{
for
(
j
=
0
;
j
<
n
-
1
-
i
;
j
++
)
{
if
(
fabs
(
p
[
j
])
<
fabs
(
p
[
j
+
1
]))
{
float
tmp
;
_______________
}
}
}
}
int
main
()
{
float
f
[
10
];
int
i
;
for
(
i
=
0
;
i
<
10
;
i
++
)
scanf
(
"%f"
,
&
f
[
i
]);
paixu
(
f
,
10
);
for
(
i
=
0
;
i
<
10
;
i
++
)
printf
(
"%.2f "
,
f
[
i
]);
return
0
;
}
```
## template
```
cpp
#include <math.h>
#include <stdio.h>
void
paixu
(
float
*
p
,
int
n
)
void
paixu
(
float
*
p
,
int
n
)
{
int
i
,
j
;
for
(
i
=
0
;
i
<
n
-
1
;
i
++
)
int
i
,
j
;
for
(
i
=
0
;
i
<
n
-
1
;
i
++
)
{
for
(
j
=
0
;
j
<
n
-
1
-
i
;
j
++
)
for
(
j
=
0
;
j
<
n
-
1
-
i
;
j
++
)
{
if
(
fabs
(
p
[
j
])
<
fabs
(
p
[
j
+
1
]))
if
(
fabs
(
p
[
j
])
<
fabs
(
p
[
j
+
1
]))
{
float
tmp
;
tmp
=
p
[
j
];
...
...
@@ -31,11 +64,11 @@ int main()
{
float
f
[
10
];
int
i
;
for
(
i
=
0
;
i
<
10
;
i
++
)
scanf
(
"%f"
,
&
f
[
i
]);
paixu
(
f
,
10
);
for
(
i
=
0
;
i
<
10
;
i
++
)
printf
(
"%.2f "
,
f
[
i
]);
for
(
i
=
0
;
i
<
10
;
i
++
)
scanf
(
"%f"
,
&
f
[
i
]);
paixu
(
f
,
10
);
for
(
i
=
0
;
i
<
10
;
i
++
)
printf
(
"%.2f "
,
f
[
i
]);
return
0
;
}
```
...
...
@@ -43,7 +76,9 @@ int main()
## 答案
```
cpp
tmp
=
p
[
j
];
p
[
j
]
=
p
[
j
+
1
];
p
[
j
+
1
]
=
tmp
;
```
## 选项
...
...
@@ -51,17 +86,23 @@ int main()
### A
```
cpp
tmp
=
p
[
j
];
p
[
j
]
=
p
[
j
-
1
];
p
[
j
-
1
]
=
tmp
;
```
### B
```
cpp
tmp
=
p
[
j
];
p
[
j
+
1
]
=
tmp
;
p
[
j
]
=
p
[
j
+
1
];
```
### C
```
cpp
tmp
=
p
[
j
];
p
[
j
-
1
]
=
tmp
;
p
[
j
]
=
p
[
j
-
1
];
```
\ No newline at end of file
data/3.dailycode高阶/1.cpp/19.exercises/solution.md
浏览文件 @
8615933c
# 擅长编码的小k
题目描述
**题目描述**
小k不仅擅长数学,也擅长编码。有一种编码方式如下:
首先写下文本中间的字符(如果文本中的字符编号为1..n,那么中间一个字符的编号为(n+1)DIV 2,其中DIV为整除的意思),然后 用这个方法递归地写下左边,最后再按这个方法递归地写下右边。例如,单词为orthography则其编码为gtorhoprahy。即先写中间的那个字符g,再对ortho递归地编码,最后将raphy递归地编码就得到了gtorhoprahy。
给一个原来的文本,求出编码后的 文本。
输入
**输入**
一行字符,表示原始的文本内容。
输出
**输出**
一行字符,表示编码后的文本内容。
样例
输入
**样例**
**输入**
```
json
orthography
输出
```
**输出**
```
json
gtorhoprahy
提示
```
**提示**
100%的数据,字符串长度不超过20000
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <iostream>
#include <cstring>
using
namespace
std
;
void
shuchu
(
char
*
a
,
int
m
,
int
n
)
{
if
(
n
<=
0
||
m
<=
0
||
m
>
n
)
{
return
;
}
else
{
cout
<<
a
[(
m
+
n
)
/
2
];
_______________________
}
}
int
main
()
{
char
a
[
20000
];
char
b
[
20001
];
cin
>>
a
;
for
(
int
i
=
0
;
i
<
20000
;
i
++
)
{
b
[
i
+
1
]
=
a
[
i
];
}
int
n
=
strlen
(
a
);
shuchu
(
b
,
1
,
n
);
return
0
;
}
```
## template
```
cpp
#include <iostream>
#include <cstring>
using
namespace
std
;
void
shuchu
(
char
*
a
,
int
m
,
int
n
)
void
shuchu
(
char
*
a
,
int
m
,
int
n
)
{
if
(
n
<=
0
||
m
<=
0
||
m
>
n
)
if
(
n
<=
0
||
m
<=
0
||
m
>
n
)
{
return
;
}
else
{
cout
<<
a
[(
m
+
n
)
/
2
];
shuchu
(
a
,
m
,(
m
+
n
)
/
2
-
1
);
shuchu
(
a
,(
m
+
n
)
/
2
+
1
,
n
);
cout
<<
a
[(
m
+
n
)
/
2
];
shuchu
(
a
,
m
,
(
m
+
n
)
/
2
-
1
);
shuchu
(
a
,
(
m
+
n
)
/
2
+
1
,
n
);
}
}
int
main
()
...
...
@@ -40,12 +91,12 @@ int main()
char
a
[
20000
];
char
b
[
20001
];
cin
>>
a
;
for
(
int
i
=
0
;
i
<
20000
;
i
++
)
for
(
int
i
=
0
;
i
<
20000
;
i
++
)
{
b
[
i
+
1
]
=
a
[
i
];
b
[
i
+
1
]
=
a
[
i
];
}
int
n
=
strlen
(
a
);
shuchu
(
b
,
1
,
n
);
shuchu
(
b
,
1
,
n
);
return
0
;
}
```
...
...
@@ -53,7 +104,8 @@ int main()
## 答案
```
cpp
shuchu
(
a
,
m
,
(
m
+
n
)
/
2
-
1
);
shuchu
(
a
,
(
m
+
n
)
/
2
+
1
,
n
);
```
## 选项
...
...
@@ -61,17 +113,20 @@ int main()
### A
```
cpp
shuchu
(
a
,
m
,
(
m
+
n
)
/
2
-
1
);
shuchu
(
a
,
(
m
+
n
)
/
2
,
n
);
```
### B
```
cpp
shuchu
(
a
,
m
,
(
m
+
n
)
/
2
+
1
);
shuchu
(
a
,
(
m
+
n
)
/
2
+
1
,
n
);
```
### C
```
cpp
shuchu
(
a
,
m
,
(
m
+
n
)
/
2
-
1
);
shuchu
(
a
,
(
m
+
n
)
/
2
-
1
,
n
);
```
\ No newline at end of file
data/3.dailycode高阶/1.cpp/20.exercises/solution.md
浏览文件 @
8615933c
# 求解一元二次方程组根问题
<pre>
利用公式x1 = (-b + sqrt(b
*b-4*
a
*c))/(2*
a), x2 = (-b - sqrt(b
*b-4*
a
*c))/(2*
a)求一元二次方程ax
<sup>
2
</sup>
+ bx + c =0 的根,其中a不等于0。
输入一行,包含三个浮点数a, b, c(它们之间以一个空格分开),分别表示方程ax
<sup>
2
</sup>
+ bx + c =0 的系数。输出一行,表示方程的解。
若两个实根相等,则输出形式为:x1=x2=...。
若两个实根不等,则输出形式为:x1=...;x2 = ...,其中x1若是两个虚根,则输出:x1=实部+虚部i; x2=实部-虚部i,其中x1,x2满足以下两个条件中的一个:
1.
x1的实部大于x2的实部
2.
x1的实部等于x2的实部且x1的虚部大于等于x2的虚部
所有实数部分要求精确到小数点后5位,数字、符号之间没有空格。
样例输入:1.0 2.0 8.0
<pre>
利用公式x1 = (-b + sqrt(b
*b-4*
a
*c))/(2*
a), x2 = (-b - sqrt(b
*b-4*
a
*c))/(2*
a)求一元二次方程ax
<sup>
2
</sup>
+ bx + c =0 的根,其中a不等于0。
<br
/>
输入一行,包含三个浮点数a, b, c(它们之间以一个空格分开),分别表示方程ax
<sup>
2
</sup>
+ bx + c =0 的系数。输出一行,表示方程的解。
<br
/>
若两个实根相等,则输出形式为:x1=x2=...。
<br
/>
若两个实根不等,则输出形式为:x1=...;x2 = ...,其中x1若是两个虚根,则输出:x1=实部+虚部i; x2=实部-虚部i,其中x1,x2满足以下两个条件中的一个:
<br
/>
1.
x1的实部大于x2的实部
<br
/>
2.
x1的实部等于x2的实部且x1的虚部大于等于x2的虚部
<br
/>
所有实数部分要求精确到小数点后5位,数字、符号之间没有空格。
<br
/>
样例输入:1.0 2.0 8.0
<br
/>
样例输出:x1=-1.00000+2.64575i;x2=-1.00000-2.64575i
</pre>
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <iostream>
#include <iomanip>
#include <cmath>
#include <complex>
using
namespace
std
;
static
const
double
e
=
1e-12
;
_______________________________
int
main
()
{
complex
<
double
>
a
,
b
,
c
;
complex
<
double
>
x1
,
x2
;
cin
>>
a
>>
b
>>
c
;
x1
=
(
-
b
+
sqrt
(
b
*
b
-
a
*
c
*
4.0
))
/
(
a
*
2.0
);
x2
=
(
-
b
-
sqrt
(
b
*
b
-
a
*
c
*
4.0
))
/
(
a
*
2.0
);
cout
<<
setiosflags
(
ios
::
fixed
);
cout
.
precision
(
6
);
if
(
abs
(
x1
.
imag
())
<
e
)
{
if
(
x1
==
x2
)
{
cout
<<
"x1=x2="
<<
x1
.
real
();
}
else
{
cout
<<
"x1="
<<
x1
.
real
()
<<
";x2="
<<
x1
.
real
();
}
}
else
{
cout
<<
"x1="
<<
x1
.
real
()
<<
"+"
<<
x1
.
imag
()
<<
"i;"
<<
"x2="
<<
x2
.
real
()
<<
"+"
<<
x2
.
imag
()
<<
"i"
;
}
return
0
;
}
```
## template
```
cpp
#include <iostream>
#include<iomanip>
#include
<iomanip>
#include <cmath>
#include <complex>
using
namespace
std
;
static
const
double
e
=
1e-12
;
bool
operator
==
(
complex
<
double
>
c1
,
complex
<
double
>
c2
)
{
return
abs
(
c1
-
c2
)
<
e
;
}
bool
operator
==
(
complex
<
double
>
c1
,
complex
<
double
>
c2
)
{
return
abs
(
c1
-
c2
)
<
e
;
}
int
main
()
{
complex
<
double
>
a
,
b
,
c
;
complex
<
double
>
x1
,
x2
;
complex
<
double
>
a
,
b
,
c
;
complex
<
double
>
x1
,
x2
;
cin
>>
a
>>
b
>>
c
;
x1
=
(
-
b
+
sqrt
(
b
*
b
-
a
*
c
*
4.0
))
/
(
a
*
2.0
);
x2
=
(
-
b
-
sqrt
(
b
*
b
-
a
*
c
*
4.0
))
/
(
a
*
2.0
);
x1
=
(
-
b
+
sqrt
(
b
*
b
-
a
*
c
*
4.0
))
/
(
a
*
2.0
);
x2
=
(
-
b
-
sqrt
(
b
*
b
-
a
*
c
*
4.0
))
/
(
a
*
2.0
);
cout
<<
setiosflags
(
ios
::
fixed
);
cout
.
precision
(
6
);
if
(
abs
(
x1
.
imag
())
<
e
)
if
(
abs
(
x1
.
imag
())
<
e
)
{
if
(
x1
==
x2
)
{
if
(
x1
==
x2
)
{
cout
<<
"x1=x2="
<<
x1
.
real
();
}
else
{
cout
<<
"x1="
<<
x1
.
real
()
<<
";x2="
<<
x1
.
real
();
}
else
{
cout
<<
"x1="
<<
x1
.
real
()
<<
";x2="
<<
x1
.
real
();
}
}
else
{
cout
<<
"x1="
<<
x1
.
real
()
<<
"+"
<<
x1
.
imag
()
<<
"i;"
<<
"x2="
<<
x2
.
real
()
<<
"+"
<<
x2
.
imag
()
<<
"i"
;
else
{
cout
<<
"x1="
<<
x1
.
real
()
<<
"+"
<<
x1
.
imag
()
<<
"i;"
<<
"x2="
<<
x2
.
real
()
<<
"+"
<<
x2
.
imag
()
<<
"i"
;
}
return
0
;
}
...
...
@@ -48,7 +91,7 @@ int main()
## 答案
```
cpp
bool
operator
==
(
complex
<
double
>
c1
,
complex
<
double
>
c2
)
{
return
abs
(
c1
-
c2
)
<
e
;
}
```
## 选项
...
...
@@ -56,17 +99,17 @@ int main()
### A
```
cpp
;
```
### B
```
cpp
bool
operator
==
(
complex
<
double
>
c1
,
complex
<
double
>
c2
)
{
return
abs
(
c1
-
c2
)
>
e
;
}
```
### C
```
cpp
bool
operator
==
(
complex
<
double
>
c1
,
complex
<
double
>
c2
)
{
return
abs
(
c1
-
c2
)
>=
e
;
}
```
\ No newline at end of file
data/3.dailycode高阶/1.cpp/21.exercises/solution.md
浏览文件 @
8615933c
...
...
@@ -52,6 +52,87 @@
</div>
</div>
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <bits/stdc++.h>
using
namespace
std
;
class
Solution
{
public:
void
solveSudoku
(
vector
<
vector
<
char
>>
&
board
)
{
int
size
=
board
.
size
();
vector
<
vector
<
bool
>>
rows
(
size
,
vector
<
bool
>
(
10
));
vector
<
vector
<
bool
>>
cols
(
size
,
vector
<
bool
>
(
10
));
vector
<
vector
<
bool
>>
boxes
(
size
,
vector
<
bool
>
(
10
));
for
(
int
i
=
0
;
i
<
size
;
i
++
)
{
for
(
int
j
=
0
;
j
<
size
;
j
++
)
{
if
(
board
[
i
][
j
]
!=
'.'
)
{
int
num
=
board
[
i
][
j
]
-
'0'
;
int
idx
=
i
/
3
*
3
+
j
/
3
;
rows
[
i
][
num
]
=
true
;
cols
[
j
][
num
]
=
true
;
boxes
[
idx
][
num
]
=
true
;
}
}
}
dfs
(
board
,
0
,
rows
,
cols
,
boxes
);
}
private:
bool
valid
(
int
num
,
int
row
,
int
col
,
int
idx
,
vector
<
vector
<
bool
>>
&
rows
,
vector
<
vector
<
bool
>>
&
cols
,
vector
<
vector
<
bool
>>
&
boxes
)
{
return
!
rows
[
row
][
num
]
&&
!
cols
[
col
][
num
]
&&
!
boxes
[
idx
][
num
];
}
bool
dfs
(
vector
<
vector
<
char
>>
&
board
,
int
size
,
vector
<
vector
<
bool
>>
&
rows
,
vector
<
vector
<
bool
>>
&
cols
,
vector
<
vector
<
bool
>>
&
boxes
)
{
if
(
size
==
9
*
9
)
{
return
true
;
}
else
{
bool
ok
=
false
;
int
row
=
size
/
9
;
int
col
=
size
%
9
;
int
idx
=
row
/
3
*
3
+
col
/
3
;
if
(
board
[
row
][
col
]
==
'.'
)
{
for
(
int
i
=
1
;
i
<=
9
;
i
++
)
{
if
(
valid
(
i
,
row
,
col
,
idx
,
rows
,
cols
,
boxes
))
{
board
[
row
][
col
]
=
i
+
'0'
;
rows
[
row
][
i
]
=
true
;
cols
[
col
][
i
]
=
true
;
boxes
[
idx
][
i
]
=
true
;
_______________________________
if
(
!
ok
)
{
rows
[
row
][
i
]
=
false
;
cols
[
col
][
i
]
=
false
;
boxes
[
idx
][
i
]
=
false
;
board
[
row
][
col
]
=
'.'
;
}
}
}
}
else
{
ok
=
dfs
(
board
,
size
+
1
,
rows
,
cols
,
boxes
);
}
return
ok
;
}
}
};
```
## template
```
cpp
...
...
@@ -82,6 +163,7 @@ public:
}
dfs
(
board
,
0
,
rows
,
cols
,
boxes
);
}
private:
bool
valid
(
int
num
,
int
row
,
int
col
,
int
idx
,
vector
<
vector
<
bool
>>
&
rows
,
vector
<
vector
<
bool
>>
&
cols
,
vector
<
vector
<
bool
>>
&
boxes
)
...
...
@@ -135,7 +217,7 @@ private:
## 答案
```
cpp
ok
=
dfs
(
board
,
size
+
1
,
rows
,
cols
,
boxes
);
```
## 选项
...
...
@@ -143,17 +225,17 @@ private:
### A
```
cpp
ok
=
dfs
(
board
,
size
-
1
,
rows
,
cols
,
boxes
);
```
### B
```
cpp
ok
=
dfs
(
board
,
size
,
rows
,
cols
,
boxes
);
```
### C
```
cpp
ok
=
dfs
(
board
,
size
,
rows
+
1
,
cols
-
1
,
boxes
);
```
\ No newline at end of file
data/3.dailycode高阶/1.cpp/22.exercises/solution.md
浏览文件 @
8615933c
...
...
@@ -2,6 +2,28 @@
<p>给定 <em>n</em> 个非负整数表示每个宽度为 1 的柱子的高度图,计算按此排列的柱子,下雨之后能接多少雨水。</p><p> </p><p><strong>示例 1:</strong></p><p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0042.Trapping%20Rain%20Water/images/rainwatertrap.png" style="height: 161px; width: 412px;" /></p><pre><strong>输入:</strong>height = [0,1,0,2,1,0,1,3,2,1,2,1]<strong><br />输出:</strong>6<strong><br />解释:</strong>上面是由数组 [0,1,0,2,1,0,1,3,2,1,2,1] 表示的高度图,在这种情况下,可以接 6 个单位的雨水(蓝色部分表示雨水)。 </pre><p><strong>示例 2:</strong></p><pre><strong>输入:</strong>height = [4,2,0,3,2,5]<strong><br />输出:</strong>9</pre><p> </p><p><strong>提示:</strong></p><ul> <li><code>n == height.length</code></li> <li><code>0 <= n <= 3 * 10<sup>4</sup></code></li> <li><code>0 <= height[i] <= 10<sup>5</sup></code></li></ul>
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <bits/stdc++.h>
using
namespace
std
;
class
Solution
{
public:
int
trap
(
vector
<
int
>
&
height
)
{
int
res
=
0
;
int
left
=
0
,
left_max
=
0
;
int
right
=
height
.
size
()
-
1
,
right_max
=
0
;
while
(
left
<
right
)
{
_____________________
}
return
res
;
}
};
```
## template
```
cpp
...
...
@@ -50,7 +72,30 @@ public:
## 答案
```
cpp
if
(
height
[
left
]
<
height
[
right
])
{
if
(
height
[
left
]
>
left_max
)
{
left_max
=
height
[
left
];
}
else
{
res
+=
left_max
-
height
[
left
];
}
left
++
;
}
else
{
if
(
height
[
right
]
>
right_max
)
{
right_max
=
height
[
right
];
}
else
{
res
+=
right_max
-
height
[
right
];
}
right
--
;
}
```
## 选项
...
...
@@ -58,17 +103,86 @@ public:
### A
```
cpp
if
(
height
[
left
]
<
height
[
right
])
{
if
(
height
[
left
]
>
left_max
)
{
left_max
=
height
[
left
];
}
else
{
res
+=
left_max
-
height
[
left
];
}
left
--
;
}
else
{
if
(
height
[
right
]
>
right_max
)
{
right_max
=
height
[
right
];
}
else
{
res
+=
right_max
-
height
[
right
];
}
right
++
;
}
```
### B
```
cpp
if
(
height
[
left
]
<
height
[
right
])
{
if
(
height
[
left
]
>
left_max
)
{
left_max
=
height
[
left
];
}
else
{
res
+=
left_max
+
height
[
left
];
}
left
++
;
}
else
{
if
(
height
[
right
]
>
right_max
)
{
right_max
=
height
[
right
];
}
else
{
res
+=
right_max
+
height
[
right
];
}
right
--
;
}
```
### C
```
cpp
if
(
height
[
left
]
<
height
[
right
])
{
if
(
height
[
left
]
>
left_max
)
{
left_max
=
height
[
left
];
}
else
{
res
+=
left_max
+
height
[
left
];
}
left
--
;
}
else
{
if
(
height
[
right
]
>
right_max
)
{
right_max
=
height
[
right
];
}
else
{
res
+=
right_max
+
height
[
right
];
}
right
++
;
}
```
\ No newline at end of file
data/3.dailycode高阶/1.cpp/23.exercises/solution.md
浏览文件 @
8615933c
...
...
@@ -2,6 +2,49 @@
<p>给定 <em>n</em> 个非负整数,用来表示柱状图中各个柱子的高度。每个柱子彼此相邻,且宽度为 1 。</p><p>求在该柱状图中,能够勾勒出来的矩形的最大面积。</p><p> </p><p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0084.Largest%20Rectangle%20in%20Histogram/images/histogram.png"></p><p><small>以上是柱状图的示例,其中每个柱子的宽度为 1,给定的高度为 <code>[2,1,5,6,2,3]</code>。</small></p><p> </p><p><img src="https://cdn.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0084.Largest%20Rectangle%20in%20Histogram/images/histogram_area.png"></p><p><small>图中阴影部分为所能勾勒出的最大矩形面积,其面积为 <code>10</code> 个单位。</small></p><p> </p><p><strong>示例:</strong></p><pre><strong>输入:</strong> [2,1,5,6,2,3]<strong><br />输出:</strong> 10</pre>
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <stdio.h>
#include <stdlib.h>
static
int
largestRectangleArea
(
int
*
heights
,
int
heightsSize
)
{
int
*
indexes
=
malloc
(
heightsSize
*
sizeof
(
int
));
int
*
left
=
malloc
(
heightsSize
*
sizeof
(
int
));
int
*
right
=
malloc
(
heightsSize
*
sizeof
(
int
));
int
i
,
pos
=
0
;
for
(
i
=
0
;
i
<
heightsSize
;
i
++
)
{
while
(
pos
>
0
&&
heights
[
indexes
[
pos
-
1
]]
>=
heights
[
i
])
{
pos
--
;
}
left
[
i
]
=
pos
==
0
?
-
1
:
indexes
[
pos
-
1
];
indexes
[
pos
++
]
=
i
;
}
pos
=
0
;
for
(
i
=
heightsSize
-
1
;
i
>=
0
;
i
--
)
{
while
(
pos
>
0
&&
heights
[
indexes
[
pos
-
1
]]
>=
heights
[
i
])
{
pos
--
;
}
right
[
i
]
=
pos
==
0
?
heightsSize
:
indexes
[
pos
-
1
];
indexes
[
pos
++
]
=
i
;
}
int
max_area
=
0
;
_______________________
return
max_area
;
}
int
main
(
void
)
{
int
nums
[]
=
{
2
,
1
,
5
,
6
,
2
,
3
};
int
count
=
sizeof
(
nums
)
/
sizeof
(
*
nums
);
printf
(
"%d
\n
"
,
largestRectangleArea
(
nums
,
count
));
return
0
;
}
```
## template
```
cpp
...
...
@@ -52,7 +95,11 @@ int main(void)
## 答案
```
cpp
for
(
i
=
0
;
i
<
heightsSize
;
i
++
)
{
int
area
=
heights
[
i
]
*
(
right
[
i
]
-
left
[
i
]
-
1
);
max_area
=
area
>
max_area
?
area
:
max_area
;
}
```
## 选项
...
...
@@ -60,17 +107,29 @@ int main(void)
### A
```
cpp
for
(
i
=
0
;
i
<
heightsSize
;
i
++
)
{
int
area
=
heights
[
i
]
*
(
right
[
i
]
-
left
[
i
]
-
1
);
max_area
=
area
>
max_area
?
max_area
:
area
;
}
```
### B
```
cpp
for
(
i
=
0
;
i
<
heightsSize
;
i
++
)
{
int
area
=
heights
[
i
]
*
(
right
[
i
]
-
left
[
i
]);
max_area
=
area
>
max_area
?
max_area
:
area
;
}
```
### C
```
cpp
for
(
i
=
0
;
i
<
heightsSize
;
i
++
)
{
int
area
=
heights
[
i
]
*
(
right
[
i
]
-
left
[
i
]);
max_area
=
area
>
max_area
?
area
:
max_area
;
}
```
\ No newline at end of file
data/3.dailycode高阶/1.cpp/24.exercises/solution.md
浏览文件 @
8615933c
...
...
@@ -2,6 +2,37 @@
<p>
给你一个未排序的整数数组
<code>
nums
</code>
,请你找出其中没有出现的最小的正整数。
</p><p>
</p><p><strong>
进阶:
</strong>
你可以实现时间复杂度为
<code>
O(n)
</code>
并且只使用常数级别额外空间的解决方案吗?
</p><p>
</p><p><strong>
示例 1:
</strong></p><pre><strong>
输入:
</strong>
nums = [1,2,0]
<strong><br
/>
输出:
</strong>
3
</pre><p><strong>
示例 2:
</strong></p><pre><strong>
输入:
</strong>
nums = [3,4,-1,1]
<strong><br
/>
输出:
</strong>
2
</pre><p><strong>
示例 3:
</strong></p><pre><strong>
输入:
</strong>
nums = [7,8,9,11,12]
<strong><br
/>
输出:
</strong>
1
</pre><p>
</p><p><strong>
提示:
</strong></p><ul>
<li><code>
0
<
=
nums.length
<=
300</
code
></li>
<li><code>
-2
<sup>
31
</sup>
<
=
nums
[
i
]
<=
2<
sup
>
31
</sup>
- 1
</code></li></ul>
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <bits/stdc++.h>
using
namespace
std
;
class
Solution
{
public:
int
firstMissingPositive
(
vector
<
int
>
&
nums
)
{
if
(
nums
.
size
()
==
0
)
{
return
1
;
}
int
i
=
0
;
while
(
i
<
nums
.
size
())
{
____________________________
}
for
(
i
=
0
;
i
<
nums
.
size
();
i
++
)
{
if
(
nums
[
i
]
!=
i
+
1
)
{
break
;
}
}
return
i
+
1
;
}
};
```
## template
```
cpp
...
...
@@ -43,7 +74,14 @@ public:
## 答案
```
cpp
if
(
nums
[
i
]
>
0
&&
nums
[
i
]
!=
i
+
1
&&
nums
[
i
]
-
1
<
nums
.
size
()
&&
nums
[
nums
[
i
]
-
1
]
!=
nums
[
i
])
{
swap
(
nums
[
i
],
nums
[
nums
[
i
]
-
1
]);
}
else
{
i
++
;
}
```
## 选项
...
...
@@ -51,17 +89,38 @@ public:
### A
```
cpp
if
(
nums
[
i
]
>
0
&&
nums
[
i
]
!=
i
+
1
&&
nums
[
i
]
-
1
<
nums
.
size
()
&&
nums
[
nums
[
i
]
-
1
]
!=
nums
[
i
])
{
swap
(
nums
[
i
],
nums
[
nums
[
i
]
+
1
]);
}
else
{
i
++
;
}
```
### B
```
cpp
if
(
nums
[
i
]
!=
i
+
1
&&
nums
[
nums
[
i
]
-
1
]
!=
nums
[
i
])
{
swap
(
nums
[
i
],
nums
[
nums
[
i
]
-
1
]);
}
else
{
i
++
;
}
```
### C
```
cpp
if
(
nums
[
i
]
!=
i
+
1
&&
nums
[
nums
[
i
]
-
1
]
!=
nums
[
i
])
{
swap
(
nums
[
i
],
nums
[
nums
[
i
]
+
1
]);
}
else
{
i
++
;
}
```
\ No newline at end of file
data/3.dailycode高阶/1.cpp/25.exercises/solution.md
浏览文件 @
8615933c
...
...
@@ -35,6 +35,54 @@
</div>
</div>
以下程序实现了这一功能,请你填补空白处的内容:
```
cpp
#include <bits/stdc++.h>
using
namespace
std
;
class
Solution
{
public:
int
totalNQueens
(
int
n
)
{
vector
<
int
>
stack
(
n
);
return
dfs
(
n
,
0
,
stack
);
}
private:
int
dfs
(
int
n
,
int
row
,
vector
<
int
>
&
stack
)
{
int
count
=
0
;
if
(
row
==
n
)
{
return
count
+
1
;
}
else
{
for
(
int
i
=
0
;
i
<
n
;
i
++
)
{
if
(
row
==
0
||
!
conflict
(
stack
,
row
,
i
))
{
stack
[
row
]
=
i
;
_______________________
}
}
return
count
;
}
}
bool
conflict
(
vector
<
int
>
&
stack
,
int
row
,
int
col
)
{
for
(
int
i
=
0
;
i
<
row
;
i
++
)
{
if
(
col
==
stack
[
i
]
||
abs
(
row
-
i
)
==
abs
(
col
-
stack
[
i
]))
{
return
true
;
}
}
return
false
;
}
}
```
## template
```
cpp
...
...
@@ -86,7 +134,7 @@ private:
## 答案
```
cpp
count
+=
dfs
(
n
,
row
+
1
,
stack
);
```
## 选项
...
...
@@ -94,17 +142,17 @@ private:
### A
```
cpp
count
+=
dfs
(
n
,
row
-
1
,
stack
);
```
### B
```
cpp
count
+=
dfs
(
n
,
row
,
stack
);
```
### C
```
cpp
count
+=
dfs
(
n
+
1
,
row
,
stack
);
```
\ No newline at end of file
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