C语言 | Leetcode C语言题解之第441题排列硬币
题目：
题解：
class Solution {
public:int arrangeCoins(int n) {return (int) ((sqrt((long long) 8 * n + 1) - 1) / 2);}
};
题目：
题解：
class Solution {
public:int arrangeCoins(int n) {return (int) ((sqrt((long long) 8 * n + 1) - 1) / 2);}
};