Submission #212277

#	Time	Username	Problem	Language	Result	Execution time	Memory
212277		jk89	Raisins (IOI09_raisins)	C++14	100 / 100	637 ms	21244 KiB

raisins

#include <cstdio>
#include <vector>
#include <algorithm>
#include <map>

using namespace std;

#define f first
#define s second

const int MAXN = 51;
const int INF = 2e9 + 3;

int pref[MAXN][MAXN];
int dp[MAXN][MAXN][MAXN][MAXN];

int rob(int x1, int y1, int x2, int y2) {
    if (dp[x1][y1][x2][y2])
        return dp[x1][y1][x2][y2];
    if (x1 == x2 && y1 == y2)
        return 0;
    int mn = INF;
    for (int i = x1; i < x2; i++)
        mn = min(mn, rob(x1, y1, i, y2) + rob(i + 1, y1, x2, y2));
    for (int i = y1; i < y2; i++)
        mn = min(mn, rob(x1, y1, x2, i) + rob(x1, i + 1, x2, y2));
    dp[x1][y1][x2][y2] = mn + pref[x2][y2] - pref[x2][y1 - 1] - pref[x1 - 1][y2] + pref[x1 - 1][y1 - 1];
    return dp[x1][y1][x2][y2];
}

int main() {
    int n, m;
    scanf("%d %d", &n, &m);
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            scanf("%d", &pref[i][j]);
            pref[i][j] += pref[i - 1][j] + pref[i][j - 1] - pref[i - 1][j - 1];
        }
    }
    printf("%d", rob(1, 1, n, m));
    return 0;
}

Compilation message (stderr)

raisins.cpp: In function 'int main()':
raisins.cpp:33:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
raisins.cpp:36:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &pref[i][j]);
             ~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100