mingtian369的专栏

https://oj.leetcode.com/problems/two-sum/ Given an array of integers, find two numbers such that they add up to a specific target number. The function twoSum should return indices of the two num

Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the possible input ca

Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321 代码： public static int reverse(int x) { int tag=1; if(x < 0){