James Pan

原题网址：https://leetcode.com/problems/sqrtx/ Implement int sqrt(int x). Compute and return the square root of x. 方法一：二分法。 public class Solution { public int mySqrt(int x) { int i=0,

原题网址：https://leetcode.com/problems/arranging-coins/ You have a total of n coins that you want to form in a staircase shape, where every k-th row must have exactly k coins. Given n, find the to