Submission #545366

#	Time	Username	Problem	Language	Result	Execution time	Memory
545366		alextodoran	Raisins (IOI09_raisins)	C++17	100 / 100	109 ms	21424 KiB

raisins

#include <bits/stdc++.h>

using namespace std;

const int N_MAX = 50;

int N, M;
int R[N_MAX + 2][N_MAX + 2];

int sum[N_MAX + 2][N_MAX + 2];
int minCost[N_MAX + 2][N_MAX + 2][N_MAX + 2][N_MAX + 2];

int main () {
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    cin >> N >> M;
    for (int i = 1; i <= N; i++) {
        for (int j = 1; j <= M; j++) {
            cin >> R[i][j];
        }
    }

    for (int i = 1; i <= N; i++) {
        for (int j = 1; j <= M; j++) {
            sum[i][j] = R[i][j] + sum[i - 1][j] + sum[i][j - 1] - sum[i - 1][j - 1];
        }
    }

    for (int i1 = N; i1 >= 1; i1--) {
        for (int i2 = i1; i2 <= N; i2++) {
            for (int j1 = M; j1 >= 1; j1--) {
                for (int j2 = j1; j2 <= M; j2++) {
                    if (i1 == i2 && j1 == j2) {
                        minCost[i1][j1][i2][j2] = 0;
                    } else {
                        minCost[i1][j1][i2][j2] = INT_MAX;
                        for (int i = i1; i < i2; i++) {
                            minCost[i1][j1][i2][j2] = min(minCost[i1][j1][i2][j2],
                                minCost[i1][j1][i][j2] + minCost[i + 1][j1][i2][j2]);
                        }
                        for (int j = j1; j < j2; j++) {
                            minCost[i1][j1][i2][j2] = min(minCost[i1][j1][i2][j2],
                                minCost[i1][j1][i2][j] + minCost[i1][j + 1][i2][j2]);
                        }
                        minCost[i1][j1][i2][j2] +=
                            sum[i2][j2] - sum[i1 - 1][j2] - sum[i2][j1 - 1] + sum[i1 - 1][j1 - 1];
                    }
                }
            }
        }
    }

    cout << minCost[1][1][N][M] << "\n";

    return 0;
}

• Subtask 1: 100 / 100