Submission #440322

#	Time	Username	Problem	Language	Result	Execution time	Memory
440322		dxz05	Raisins (IOI09_raisins)	C++14	100 / 100	1604 ms	59592 KiB

raisins

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 55;

int arr[55][55];

long long dp[55][55][55][55];
long long calc(int a, int b, int c, int d){
    if (dp[a][b][c][d] != -1) return dp[a][b][c][d];
    if (a == c && b == d) return dp[a][b][c][d] = 0;
    if (a > c || b > d) return dp[a][b][c][d] = 2e9;

    dp[a][b][c][d] = 2e9;
    for (int i = a; i < c; i++){
        dp[a][b][c][d] = min(dp[a][b][c][d], calc(a, b, i, d) + calc(i + 1, b, c, d));
    }

    for (int i = b; i < d; i++){
        dp[a][b][c][d] = min(dp[a][b][c][d], calc(a, b, c, i) + calc(a, i + 1, c, d));
    }

    for (int i = a; i <= c; i++){
        for (int j = b; j <= d; j++){
            dp[a][b][c][d] += arr[i][j];
        }
    }

    //cout << a << ' ' << b << ' ' << c << ' ' << d << ' ' << dp[a][b][c][d] << endl;

    return dp[a][b][c][d];
}

int main(){
    int n, m;
    cin >> n >> m;

    for (int i = 1; i <= n; i++){
        for (int j = 1; j <= m; j++){
            cin >> arr[i][j];
        }
    }

    for (int i = 1; i <= n; i++){
        for (int j = 1; j <= m; j++){
            for (int ii = 1; ii <= n; ii++){
                for (int jj = 1; jj <= m; jj++){
                    dp[i][j][ii][jj] = -1;
                }
            }
        }
    }

    cout << calc(1, 1, n, m);

    return 0;
}

• Subtask 1: 100 / 100