LeetCode 343.整数拆分

1.题目要求:

2.题目代码:

class Solution {
public:
    int integerBreak(int n) {
        //先确定dp数组
        vector<int> dp;
        //1.确定dp数组的含义
        //2.确定dp的递推公式
        //3.初始化dp数组
        //4.遍历顺序
        dp.resize(n + 1);
        dp[0] = 0;
        dp[1] = 0;
        dp[2] = 1;
        for(int i = 3;i <= n;i++){
            for(int j = 1;j < i;j++){
                vector<int> array;
                array.push_back(j * (i - j));
                array.push_back(j * dp[i - j]);
                array.push_back(dp[i]);
                vector<int> :: iterator it = max_element(array.begin(),array.end());
                dp[i] = *it;
            }
        }
        return dp[n];
    }
};