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Submission #333687

# Submission time Handle Problem Language Result Execution time Memory
333687 2020-12-07T13:47:15 Z ncduy0303 Orchard (NOI14_orchard) C++17
25 / 25
 118 ms 8172 KB 
#include <bits/stdc++.h>

using namespace std;

#define ar array
#define ll long long

const int MAX_N = 1e5 + 1;
const int MOD = 1e9 + 7;
const int INF = 1e9;
const ll LINF = 1e18;



void solve() {
    int n, m; cin >> n >> m;
    int sum = 0, ps[n + 1][m + 1] = {};
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            char c; cin >> c;
            int d = c == '1' ? 1 : -1;
            ps[i][j] = ps[i - 1][j] + ps[i][j - 1] - ps[i - 1][j - 1] + d;
            sum += c == '1';
        }
    }
    int ans = 0; // rectangle with maximum score
    for (int i = 1; i <= n; i++) {
        for (int j = i; j <= n; j++) {
            int mn = 0;
            for (int k = 1; k <= m; k++) {
                int cur = ps[j][k] - ps[i - 1][k];
                ans = max(ans, cur - mn);
                mn = min(mn, cur);
            }
        }
    }
    cout << sum - ans << "\n";
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);

    int tc = 1;
    // cin >> tc;
    for (int t = 1; t <= tc; t++) {
        // cout << "Case #" << t  << ": ";
        solve();
    }
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct

Subtask #2
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 492 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 1 ms 492 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 52 ms 8172 KB Output is correct
2 Correct 29 ms 8172 KB Output is correct
3 Correct 36 ms 8172 KB Output is correct

Subtask #4
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 1516 KB Output is correct
2 Correct 6 ms 1516 KB Output is correct
3 Correct 6 ms 1516 KB Output is correct

Subtask #5
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 364 KB Output is correct
2 Correct 4 ms 364 KB Output is correct
3 Correct 4 ms 364 KB Output is correct

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 104 ms 3308 KB Output is correct
2 Correct 118 ms 3584 KB Output is correct
3 Correct 107 ms 3436 KB Output is correct