Submission #1346843

#	Time	Username	Problem	Language	Result	Execution time	Memory
1346843		kawhiet	Orchard (NOI14_orchard)	C++20	25 / 25	89 ms	8260 KiB

orchard

#include <bits/stdc++.h>
using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define dbg(...) 47
#endif

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n, m;
    cin >> n >> m;
    vector<vector<int>> a(n, vector<int>(m));
    int cnt = 0;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cin >> a[i][j];
            if (a[i][j] == 0) {
                a[i][j] = -1;
            } else {
                cnt++;
            }
        }
    }   
    int ans = -1e9;
    for (int l = 0; l < n; l++) {
        vector<int> col(m, 0);
        for (int r = l; r < n; r++) {
            for (int j = 0; j < m; j++) {
                col[j] += a[r][j];
            }
            int cur = 0, res = -1e9;
            for (int j = 0; j < m; j++) {
                cur = max(col[j], cur + col[j]);
                res = max(res, cur);
            }
            ans = max(ans, res);
        }
    }
    cout << cnt - ans << '\n';
    return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 4 / 4
• Subtask 3: 5 / 5
• Subtask 4: 3 / 3
• Subtask 5: 4 / 4
• Subtask 6: 5 / 5