oj.uz

Submission #870826

# Submission time Handle Problem Language Result Execution time Memory
870826 2023-11-09T08:43:18 Z vjudge1 Sajam (COCI18_sajam) C++17
45 / 90
 2320 ms 1428 KB 
//author: Ahmet Alp Orakci
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
#define int i64

const int MAXN = 1E3 + 5;

char matrix[MAXN][MAXN];

#define ONLINE_JUDGE
void solve() {
    int n, k;
    cin >> n >> k;
    
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= n; j++) {
            cin >> matrix[i][j];
        }
    }

    auto reversex = [&](int x) -> void {
        for(int i = 1; i <= n; i++) {
            matrix[x][i] = (matrix[x][i] == 'o' ? 'x' : 'o');
        }
    };

    auto reversey = [&](int x) -> void {
        for(int i = 1; i <= n; i++) {
            matrix[i][x] = (matrix[i][x] == 'o' ? 'x' : 'o');
        }
    };

    int anss = int(1E18);
    for(int t = 1; t <= n; t++) {
        for(int i = 1; i <= n; i++) {
            if(matrix[i][t] != 'o') {
                reversex(i);
            }
        }

        int ans = 0;
        for(int i = 1; i <= n; i++) {
            int cnto = 0;
            for(int j = 1; j <= n; j++) {
                cnto += (matrix[j][i] == 'o');
            }

            ans += min(cnto, n - cnto);
        }

        /*
        cerr << t << " :: " << ans << "\n";
        for(int i = 1; i <= n; i++) {
            for(int j = 1; j <= n; j++) {
                cerr << matrix[i][j];
            }
            cerr << "\n";
        }
        */

        assert(0 <= ans);
        anss = min(anss, ans);
    }

    for(int t = 1; t <= n; t++) {
        for(int i = 1; i <= n; i++) {
            if(matrix[t][i] != 'o') {
                reversey(i);
            }
        }

        int ans = 0;
        for(int i = 1; i <= n; i++) {
            int cnto = 0;
            for(int j = 1; j <= n; j++) {
                cnto += (matrix[i][j] == 'o');
            }

            ans += min(cnto, n - cnto);
        }

        /*
        cerr << t << " :: " << ans << "\n";
        for(int i = 1; i <= n; i++) {
            for(int j = 1; j <= n; j++) {
                cerr << matrix[i][j];
            }
            cerr << "\n";
        }
        */

        assert(0 <= ans);
        anss = min(anss, ans);
    }

    assert(0 <= anss);
    cout << (anss <= k ? "DA" : "NE");
    
    return;
}

signed main() {
    #ifndef ONLINE_JUDGE
        freopen(".in", "r", stdin);
        freopen(".out", "w", stdout);
    #endif

    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    int t = 1; //cin >> t;
    for(int i = 1; i <= t; i++) {
        solve();
    }

    return 0;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 143 ms 860 KB Output is correct
3 Correct 245 ms 944 KB Output is correct
4 Correct 1446 ms 1332 KB Output is correct
5 Correct 262 ms 952 KB Output is correct
6 Correct 62 ms 604 KB Output is correct
7 Correct 283 ms 932 KB Output is correct
8 Correct 1912 ms 1372 KB Output is correct
9 Correct 31 ms 600 KB Output is correct
10 Correct 1965 ms 1368 KB Output is correct

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Incorrect 2 ms 348 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 808 ms 1180 KB Output is correct
2 Correct 1118 ms 1260 KB Output is correct
3 Correct 606 ms 1116 KB Output is correct
4 Correct 495 ms 1068 KB Output is correct
5 Correct 1398 ms 1332 KB Output is correct
6 Correct 296 ms 860 KB Output is correct
7 Correct 779 ms 1168 KB Output is correct
8 Correct 911 ms 1364 KB Output is correct
9 Correct 153 ms 836 KB Output is correct
10 Correct 2320 ms 1412 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1247 ms 1312 KB Output is correct
2 Correct 1210 ms 1284 KB Output is correct
3 Correct 513 ms 1084 KB Output is correct
4 Correct 777 ms 1164 KB Output is correct
5 Correct 835 ms 1116 KB Output is correct
6 Correct 1740 ms 1396 KB Output is correct
7 Correct 193 ms 920 KB Output is correct
8 Correct 725 ms 1160 KB Output is correct
9 Correct 1045 ms 1360 KB Output is correct
10 Correct 2293 ms 1416 KB Output is correct

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 516 ms 1096 KB Output is correct
2 Correct 528 ms 860 KB Output is correct
3 Incorrect 1820 ms 1412 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1864 ms 1428 KB Output is correct
2 Correct 1756 ms 1400 KB Output is correct
3 Incorrect 1539 ms 1372 KB Output isn't correct
4 Halted 0 ms 0 KB -