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Submission #656849

# Submission time Handle Problem Language Result Execution time Memory
656849 2022-11-08T10:36:15 Z happypotato Raisins (IOI09_raisins) C++17
100 / 100
 648 ms 51424 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
const ll int MAX = 1e18;
ll int dp[51][51][51][51];
ll int a[51][51], ps[51][51];
int n, m;
void input() {
    cin >> n >> m;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            cin >> a[i][j];
        }
    }
}
void init() {
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            for (int k = 1; k <= n; k++) {
                for (int l = 1; l <= m; l++) {
                    dp[i][j][k][l] = -1;
                }
            }
        }
    }
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            ps[i][j] = (ps[i][j - 1] + ps[i - 1][j] - ps[i - 1][j - 1]) + a[i][j];
        }
    }
}
ll int recur(int x1, int y1, int x2, int y2) {
    if (dp[x1][y1][x2][y2] != -1) return dp[x1][y1][x2][y2];
    if (x1 == x2 && y1 == y2) return dp[x1][y1][x2][y2] = 0;
    dp[x1][y1][x2][y2] = MAX;
    for (int x = x1; x < x2; x++) {
        ll int cur = recur(x1, y1, x, y2) + recur(x + 1, y1, x2, y2);
        dp[x1][y1][x2][y2] = min(dp[x1][y1][x2][y2], cur);
    }
    for (int y = y1; y < y2; y++) {
        ll int cur = recur(x1, y1, x2, y) + recur(x1, y + 1, x2, y2);
        dp[x1][y1][x2][y2] = min(dp[x1][y1][x2][y2], cur);
    }
    dp[x1][y1][x2][y2] += ps[x2][y2] - ps[x1 - 1][y2] - ps[x2][y1 - 1] + ps[x1 - 1][y1 - 1];
    return dp[x1][y1][x2][y2];
}
int main() {
    input();
    init();
    cout << recur(1, 1, n, m) << endl;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 316 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct
7 Correct 1 ms 1492 KB Output is correct
8 Correct 12 ms 4896 KB Output is correct
9 Correct 15 ms 7348 KB Output is correct
10 Correct 24 ms 8916 KB Output is correct
11 Correct 21 ms 7124 KB Output is correct
12 Correct 62 ms 16852 KB Output is correct
13 Correct 100 ms 22256 KB Output is correct
14 Correct 30 ms 9108 KB Output is correct
15 Correct 135 ms 25228 KB Output is correct
16 Correct 14 ms 8660 KB Output is correct
17 Correct 56 ms 18308 KB Output is correct
18 Correct 322 ms 39636 KB Output is correct
19 Correct 529 ms 48380 KB Output is correct
20 Correct 648 ms 51424 KB Output is correct