剑指offer贪心14-I. 剪绳子

Posted 2020-11-28 trevo

题目链接：https://leetcode-cn.com/problems/jian-sheng-zi-lcof/

贪心

class Solution {
public:
    int cuttingRope(int n) {
        if(n <= 3) return 1 * (n - 1);
        
        int res = 1;
           
        if(n % 3 == 1)  res = 4, n -= 4;
        else if(n % 3 == 2) res = 2, n -= 2;
        while(n) res *= 3, n -= 3;
        return res;
    }
};