删除LeetcodeProblems

Problems/LeetcodeProblems/1-two-sum.h

-class Solution {
-public:
-    vector<int> twoSum(vector<int>& nums, int target) {
-        vector<int> sum;
-        for(auto i = 0;  i < nums.size(); i++)
-        {
-            for(auto j = i+1; j < nums.size(); j++)
-            {
-                if(i == j) continue;
-                if(nums[i] + nums[j] != target) continue;
-                sum.push_back(i);
-                sum.push_back(j);
-                return sum;
-            }
-        }
-        return sum;
-    }
-};
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Problems/LeetcodeProblems/11-container-with-most-water.h

-class Solution {
-public:
-    int maxArea(vector<int>& height) {
-        int left = 0, right = height.size()-1;
-        int max = 0, temp = 0;
-        while(left < right) {
-            temp = (right - left) * (height[left] < height[right] ? height[left] : height[right]);
-            if(max < temp) max = temp;
-            if(height[left] < height[right]) {
-                do{
-                    left++;
-                } while(left < right && height[left-1] >= height[left]);
-            }
-            else {
-                do{
-                    right--;
-                } while(left < right && height[right] <= height[right+1]);
-            }
-        }
-        return max;
-    }
-};
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Problems/LeetcodeProblems/118-pascals-triangle.h

-class Solution {
-public:
-    vector<vector<int>> generate(int numRows) {
-        vector<vector<int>> triangle;
-        for(int i = 0; i < numRows; i++){
-            vector<int> v;
-            if(i==0){
-                v.push_back(1);
-            }
-            else{
-                v.push_back(1);
-                for(int j = 0; j < triangle[i-1].size()-1; j++){
-                    v.push_back(triangle[i-1][j] + triangle[i-1][j+1]);
-                }
-                v.push_back(1);
-            }
-            triangle.push_back(v);
-        }
-        return triangle;
-    }
-};
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Problems/LeetcodeProblems/119-pascals-triangle-ii.h

-class Solution {
-public:
-    vector<int> getRow(int rowIndex) {
-        vector<int> v(rowIndex + 1, 0);
-        v[0] = 1;
-        for (int i = 0; i < rowIndex; i++){
-            for(int j = i + 1; j > 0; j--){
-                v[j] += v[j - 1];
-            } 
-        }
-        return v;
-    }
-};
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Problems/LeetcodeProblems/121-best-time-to-buy-and-sell-stock.h

-class Solution {
-public:
-    int maxProfit(vector<int>& prices) {
-        int left = 0, right = 0;
-        int max = 0, temp = 0;
-        for(auto i = 0; i < prices.size(); ++i) {
-            right = i;
-            temp = prices[right] - prices[left];
-            if(temp < 0) left = i;
-            if(max < temp) max = temp;
-        }
-        return max;
-    }
-};
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Problems/LeetcodeProblems/122-best-time-to-buy-and-sell-stock-ii.h

-class Solution {
-public:
-    int maxProfit(vector<int>& prices) {
-        int max=0, begin=0, end=0;
-        bool up=false, down=false;
-        for (int i=1; i<prices.size(); i++) {
-            if (prices[i] > prices[i-1] && up==false){ // goes up
-                begin = i-1;
-                up = true;
-                down = false;
-            }
-            if (prices[i] < prices[i-1] && down==false) { // goes down
-                end = i-1;
-                down = true;
-                up = false;
-                max += (prices[end] - prices[begin]);
-            }
-        }
-        // edge case 
-        if (begin < prices.size() && up==true){
-            end = prices.size() - 1;
-            max += (prices[end] - prices[begin]);
-        }
-        return max;
-    }
-};
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Problems/LeetcodeProblems/169-majority-element.h

-#include <map>
-class Solution {
-public:
-	int majorityElement(vector<int>& nums) {
-		int n = nums.size();
-		map<int, int> m_times;
-		int moreThanTimes = n / 2;
-		for (auto i = 0; i < n; ++i) {
-			auto it = m_times.find(nums[i]);
-			if (it == m_times.end()) {
-				// No existence in map, insert
-				m_times.insert(std::pair<int, int>(nums[i], 1));
-				it = m_times.find(nums[i]);
-			}
-			// Is it more than ⌊ n/2 ⌋ times ?
-			if ((*it).second > moreThanTimes) {
-				return (*it).first;
-			}
-			else {
-				(*it).second++;
-			}
-		}
-		// Can't find
-		return -1;
-	}
-};
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Problems/LeetcodeProblems/26-remove-duplicates-from-sorted-array.h

-class Solution {
-public:
-    int removeDuplicates(vector<int>& nums) {
-        int n = nums.size(), pos = 0;
-        if(n <= 1) 
-            return n;
-        for(int i = 0; i < n-1; ++i) {
-            if(nums[i] != nums[i+1]) {
-                nums[++pos] = nums[i+1];
-            }
-        }
-        return pos+1;
-    }
-};
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Problems/LeetcodeProblems/283-move-zeroes.h

-class Solution {
-public:
-    void moveZeroes(vector<int>& nums) {
-        int left = 0, right = 0;
-        for(; left < nums.size() && nums[left] != 0; left++);
-        for(right = left; right < nums.size(); right++) {
-            if(nums[right] == 0) continue;
-            nums[left++] = nums[right];
-        }
-        while(left < nums.size()) nums[left++] = 0;
-    }
-};
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Problems/LeetcodeProblems/4-median-of-two-sorted-arrays.h

-class Solution {
-public:
-	double findMedianSortedArrays(vector<int>& nums1, vector<int>& nums2) {
-        int len1 = nums1.size();
-	    int len2 = nums2.size();
-        int len = len1 + len2;
-        if(len & 1)
-            return findKth(nums1, 0, nums2, 0, len / 2 + 1);
-        else
-            return (findKth(nums1, 0, nums2, 0, len / 2) + findKth(nums1, 0, nums2, 0, len / 2 + 1)) / 2;
-	}
-    
-	// find kth number of two sorted array
-	double findKth(vector<int>& nums1, int i1, vector<int>& nums2, int i2, int k) {
-		if (i1 >= nums1.size()) {
-			return nums2[i2 + k - 1];
-		}
-		if (i2 >= nums2.size()) {
-			return nums1[i1 + k - 1];
-		}
-		if (k == 1) {
-			return min(nums1[i1], nums2[i2]);
-		}
-		int key1 = i1 + k / 2 - 1 >= nums1.size() ? INT_MAX : nums1[i1 + k / 2 - 1];
-		int key2 = i2 + k / 2 - 1 >= nums2.size() ? INT_MAX : nums2[i2 + k / 2 - 1];
-		if (key1<key2) {
-			return findKth(nums1, i1 + k / 2, nums2, i2, k - k / 2);
-		}
-		else {
-			return findKth(nums1, i1, nums2, i2 + k / 2, k - k / 2);
-		}
-	}
-
-};
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Problems/LeetcodeProblems/53-maximum-subarray.h

-#define MIN_INT -2147483648
-class Solution {
-public:
-    int maxSubArray(vector<int>& nums) {
-        int max = MIN_INT, temp = 0;
-        for(auto i = 0; i < nums.size(); ++i) {
-            temp += nums[i];
-            if(temp > max) max = temp;
-            if(temp < 0) temp = 0;
-        }
-        return max;
-    }
-};
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Problems/LeetcodeProblems/66-plus-one.h

-class Solution {
-public:
-    vector<int> plusOne(vector<int>& digits) {
-        int carry = 1;
-        for(int i = digits.size() - 1; i >= 0; --i) {
-            int add = digits[i] + carry;
-            digits[i] = add % 10;
-            carry = add / 10;
-        }
-        if(carry > 0) {
-            digits.insert(digits.begin(), carry);
-        }
-        return digits;
-    }
-};
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Problems/LeetcodeProblems/88-merge-sorted-array.h

-class Solution {
-public:
-    void merge(vector<int>& nums1, int m, vector<int>& nums2, int n) {
-        int i1 = m - 1, i2 = n - 1;
-        for(int i = m + n - 1; i  >= 0; i--) {
-            if(i1 >= 0 && i2 < 0)
-                break;
-            if(i1 < 0 && i2 >= 0) {
-                nums1[i] = nums2[i2--];
-            }
-            if(i1 >= 0 && i2 >= 0) {
-                if(nums1[i1] > nums2[i2]) {
-                    nums1[i] = nums1[i1--];
-                } else {
-                    nums1[i] = nums2[i2--];
-                } 
-            }
-        }
-    }
-};
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