oj.uz

Submission #996289

# Submission time Handle Problem Language Result Execution time Memory
996289 2024-06-10T11:36:12 Z yanb The Kingdom of JOIOI (JOI17_joioi) C++14
100 / 100
 1548 ms 101840 KB 
#include <bits/stdc++.h>

using namespace std;

#define int long long

int mn = 1e11, mx = -1e11;

bool good(int n, int m, vector<vector<int>> &a, int x) {
    int pos = -1;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (a[i][j] <= mx - x) pos = max(j, pos);
        }
        for (int j = 0; j < m; j++) {
            if (a[i][j] >= mn + x && j <= pos) return 0;
        }
    }
    return 1;
}

int solve(int n, int m, vector<vector<int>> &a) {
    /*for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cout << a[i][j] << " ";
        }
        cout << "\n";
    }*/

    int l = -1, r = 2e9;
    while (r - l > 1) {
        int md = (l + r) / 2;
        if (good(n, m, a, md)) {
            //cout << "Good " << md << "\n";
            r = md;
        } else {
            //cout << "Bad " << md << "\n";
            l = md;
        }
    }
    //cout << l << "\n\n";

    //cout << "." << endl;
    return l;
}

vector<vector<int>> flipv(int n, int m, vector<vector<int>> &a) {
    vector<vector<int>> ans(n, vector<int>(m));
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            ans[i][j] = a[i][m - j - 1];
        }
    }
    return ans;
}

vector<vector<int>> flips(int n, int m, vector<vector<int>> &a) {
    mn = -mn, mx = -mx;
    swap(mn, mx);

    vector<vector<int>> ans(n, vector<int>(m));
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            ans[i][j] = -a[i][j];
        }
    }
    return ans;
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n, m;
    cin >> n >> m;
    vector<vector<int>> a(n, vector<int>(m));

    for (int i = 0; i < n; i++)
        for (int j = 0; j < m; j++)
            cin >> a[i][j];

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            mn = min(mn, a[i][j]);
            mx = max(mx, a[i][j]);
        }
    }

    int ans = solve(n, m, a);
    reverse(a.begin(), a.end());
    ans = min(ans, solve(n, m, a));
    a = flipv(n, m, a);
    ans = min(ans, solve(n, m, a));
    reverse(a.begin(), a.end());
    ans = min(ans, solve(n, m, a));
    a = flips(n, m, a);
    ans = min(ans, solve(n, m, a));
    reverse(a.begin(), a.end());
    ans = min(ans, solve(n, m, a));
    a = flipv(n, m, a);
    ans = min(ans, solve(n, m, a));
    reverse(a.begin(), a.end());
    ans = min(ans, solve(n, m, a));

    cout << ans << "\n";
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 452 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 456 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 452 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 456 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 14 ms 1116 KB Output is correct
17 Correct 14 ms 1368 KB Output is correct
18 Correct 14 ms 1360 KB Output is correct
19 Correct 17 ms 1208 KB Output is correct
20 Correct 14 ms 1216 KB Output is correct
21 Correct 11 ms 1456 KB Output is correct
22 Correct 11 ms 1372 KB Output is correct
23 Correct 14 ms 1432 KB Output is correct
24 Correct 10 ms 1216 KB Output is correct
25 Correct 17 ms 1492 KB Output is correct
26 Correct 12 ms 1460 KB Output is correct
27 Correct 11 ms 1460 KB Output is correct
28 Correct 11 ms 1596 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 452 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 456 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 14 ms 1116 KB Output is correct
17 Correct 14 ms 1368 KB Output is correct
18 Correct 14 ms 1360 KB Output is correct
19 Correct 17 ms 1208 KB Output is correct
20 Correct 14 ms 1216 KB Output is correct
21 Correct 11 ms 1456 KB Output is correct
22 Correct 11 ms 1372 KB Output is correct
23 Correct 14 ms 1432 KB Output is correct
24 Correct 10 ms 1216 KB Output is correct
25 Correct 17 ms 1492 KB Output is correct
26 Correct 12 ms 1460 KB Output is correct
27 Correct 11 ms 1460 KB Output is correct
28 Correct 11 ms 1596 KB Output is correct
29 Correct 1342 ms 71228 KB Output is correct
30 Correct 1334 ms 80164 KB Output is correct
31 Correct 1548 ms 86068 KB Output is correct
32 Correct 1333 ms 86376 KB Output is correct
33 Correct 1149 ms 75092 KB Output is correct
34 Correct 1465 ms 86352 KB Output is correct
35 Correct 951 ms 101712 KB Output is correct
36 Correct 838 ms 89064 KB Output is correct
37 Correct 1222 ms 101840 KB Output is correct