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