#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 1e3 + 5;
int a[N][N], x[N][N], n, m, k, ps[N][N];
bool c (int ar, int l, int r) {
// cout << ar << '\n';
for (int i = 1; i <= sqrt(ar); i++) {
int k = l + i - 1, j = r + (ar / i) - 1;
if (k <= n && j <= m) {
int sum = ps[k][j] - ps[l - 1][j] - ps[k][r - 1] + ps[l - 1][r - 1];
// cout << l << ' ' << r << ' ' << k << ' ' << j << ' ' << sum << '\n';
if (sum == ar) return 1;
}
} for (int i = 1; i <= sqrt(ar); i++) {
int k = l + (ar / i) - 1, j = r + i - 1;
if (k <= n && j <= m) {
int sum = ps[k][j] - ps[l - 1][j] - ps[k][r - 1] + ps[l - 1][r - 1];
// cout << l << ' ' << r << ' ' << k << ' ' << j << ' ' << sum << '\n';
if (sum == ar) return 1;
}
} return 0;
}
int check (int d) {
// cout << d << '\n';
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= m; j++) {
if (a[i][j] >= d) x[i][j] = 1;
else x[i][j] = 0;
ps[i][j] = ps[i - 1][j] + ps[i][j - 1] - ps[i - 1][j - 1] + x[i][j];
// cout << ps[i][j] << ' ';
}
// cout << '\n';
}
int ans = 0;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= m; j++) {
int l = k, r = (n - i + 1) * (m - j + 1), res = 0;
while (l <= r) {
int md = (l + r) / 2;
// cout << md << ' ' << c(md, i, j) << '\n';
if (c(md, i, j)) l = md + 1, res = md;
else r = md - 1;
}
ans = max(ans, res);
}
} return ans;
}
int main () {
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
cin >> n >> m >> k;
int mx = 0;
for (int i = 0; i < N; i++)
for (int j = 0; j < N; j++)
a[i][j] = 0, x[i][j] = 0, ps[i][j] = 0;
for (int i = 1; i <= n; i++)
for (int j = 1; j <= m; j++) {
cin >> a[i][j];
mx = max(mx, a[i][j]);
}
int l = 0, r = mx, res = 0, ans = 0;
while (l <= r) {
int md = (l + r) / 2;
// cout << md << '\n';
if (check(md) > 0) l = md + 1, res = md, ans = check(md);
else r = md - 1;
} cout << res << ' ' << ans << '\n';
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
12116 KB |
Output is correct |
| 2 |
Incorrect |
6 ms |
12116 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
