1278.分割回文串III 记录

1.C++不支持嵌套定义

题解：

class Solution {
public:
    int cost(string &s, int l, int r){
            int ret = 0;
            for(int i = l,j = r;i<j;i++,j--){
                if(s[i] != s[j]){
                    ret++;
                }
            }
            return ret;
        }
    int palindromePartition(string s, int k) {
        int n = s.size();
        vector<vector<int>> f(n+1,vector<int>(n+1,INT_MAX));
        f[0][0] = 0;
        for(int i = 1;i<=n;i++){
            for(int j = 1;j <= min(k,i);j++){
                if(j == 1){
                    f[i][j] = cost(s, 0 ,i-1);
                }
                else{
                    for(int i0 = j - 1;i0<i;i0++){
                        f[i][j] = min(f[i][j],f[i0][j-1]+cost(s,i0,i-1));
                    }
                }
            }
        }
        return f[n][k];
    }
};