Submission #911162

#	Time	Username	Problem	Language	Result	Execution time	Memory
911162		blackslex	Raisins (IOI09_raisins)	C++17	100 / 100	98 ms	35332 KiB

raisins

#include<bits/stdc++.h>

using namespace std;

const int N = 55;
int n, m, a[N][N], pref[N][N], dp[N][N][N][N];

int main() {
    scanf("%d %d", &n, &m);
    for (int ix = 1; ix <= n; ix++) for (int jx = 1; jx <= n; jx++) for (int iy = 1; iy <= m; iy++) for (int jy = 1; jy <= m; jy++) dp[ix][iy][jx][jy] = 1e9;
    for (int i = 1; i <= n; i++) for (int j = 1; j <= m; j++) scanf("%d", &a[i][j]), pref[i][j] = pref[i - 1][j] + pref[i][j - 1] - pref[i - 1][j - 1] + a[i][j], dp[i][j][i][j] = 0;
    for (int szx = 0; szx <= n; szx++) {
        for (int szy = 0; szy <= m; szy++) {
            if (!szx && !szy) continue;
            for (int lx = 1, rx = lx + szx; rx <= n; lx++, rx++) {
                for (int ly = 1, ry = ly + szy; ry <= m; ly++, ry++) {
                    for (int kx = lx; kx < rx; kx++) dp[lx][ly][rx][ry] = min(dp[lx][ly][rx][ry], dp[lx][ly][kx][ry] + dp[kx + 1][ly][rx][ry]);
                    for (int ky = ly; ky < ry; ky++) dp[lx][ly][rx][ry] = min(dp[lx][ly][rx][ry], dp[lx][ly][rx][ky] + dp[lx][ky + 1][rx][ry]);
                    dp[lx][ly][rx][ry] += pref[rx][ry] - pref[lx - 1][ry] - pref[rx][ly - 1] + pref[lx - 1][ly - 1];
                }
            }
        }
    }
    printf("%d", dp[1][1][n][m]);
}

Compilation message (stderr)

raisins.cpp: In function 'int main()':
raisins.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
raisins.cpp:11:68: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     for (int i = 1; i <= n; i++) for (int j = 1; j <= m; j++) scanf("%d", &a[i][j]), pref[i][j] = pref[i - 1][j] + pref[i][j - 1] - pref[i - 1][j - 1] + a[i][j], dp[i][j][i][j] = 0;
      |                                                               ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100