fix:字符串相加

01-数组/day05/problem_solving_01.py

+"""
+字符串相加
+"""
+
+
+class Solution:
+    def addStrings(self, num1: str, num2: str) -> str:
+        """
+        双指针
+        :param num1:
+        :param num2:
+        :return:
+        """
+        res = ""
+        i, j, carry = len(num1) - 1, len(num2) - 1, 0
+        while i >= 0 or j >= 0:
+            n1 = int(num1[i]) if i >= 0 else 0
+            n2 = int(num2[j]) if j >= 0 else 0
+            all = n1 + n2 + carry
+            carry = all // 10
+            res = str(all % 10) + res
+            i -= 1
+            j -= 1
+        return "1" + res if carry else res
+
+
+if __name__ == '__main__':
+    result = Solution().addStrings("11", "123")
+    print(result)