oj.uz

Submission #1033329

# Submission time Handle Problem Language Result Execution time Memory
1033329 2024-07-24T16:32:26 Z vjudge1 The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 864 ms 70740 KB 
#include <bits/stdc++.h>
using namespace std;
 
const int N = 2005;
 
int n, m, mn = 1e9, a[N][N], b[N][N], f[N];
 
bool check0(int x) {
	f[0] = 1e9;
	int _mn, _mx;
	_mn = 1e9, _mx = 0;
	for (int i = 1; i <= n; ++i) {
		int mx = 0; f[i] = 0;
		for (int j = 1; j <= m; ++j) {
			mx = max(mx, b[i][j]);
			if (mx - mn > x) break;
			f[i]++;
		}
		f[i] = min(f[i], f[i - 1]);
		for (int j = f[i] + 1; j <= m; ++j) {
			_mn = min(_mn, b[i][j]);
			_mx = max(_mx, b[i][j]);
		}
	}
	return _mx - _mn <= x;
}
 
bool check1(int x) {
	bool ok = 0;
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			b[i][j] = a[i][j];
		}
	}
	ok |= check0(x);
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			b[i][j] = a[i][m - j + 1];
		}
	}
	ok |= check0(x);
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			b[i][j] = a[n - i + 1][j];
		}
	}
	ok |= check0(x);
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			b[i][j] = a[n - i + 1][m - j + 1];
		}
	}
	ok |= check0(x);
	return ok;
}
 
int main() {
	ios::sync_with_stdio(false);
	cin >> n >> m;
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			cin >> a[i][j], mn = min(mn, a[i][j]);
		}
	}
 
	int l = 0, r = 1e9;
	while (l < r) {
		int mid = (l + r) >> 1;
		if (check1(mid)) r = mid;
		else l = mid + 1;
	}
	cout << l;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 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 344 KB Output is correct
6 Correct 0 ms 348 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 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 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 0 ms 348 KB Output is correct
2 Correct 1 ms 348 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 344 KB Output is correct
6 Correct 0 ms 348 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 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 7 ms 2428 KB Output is correct
17 Correct 9 ms 2440 KB Output is correct
18 Correct 10 ms 2652 KB Output is correct
19 Correct 9 ms 2652 KB Output is correct
20 Correct 8 ms 2392 KB Output is correct
21 Correct 11 ms 2788 KB Output is correct
22 Correct 12 ms 2756 KB Output is correct
23 Correct 10 ms 2652 KB Output is correct
24 Correct 8 ms 2384 KB Output is correct
25 Correct 10 ms 2652 KB Output is correct
26 Correct 11 ms 2684 KB Output is correct
27 Correct 11 ms 2652 KB Output is correct
28 Correct 10 ms 2688 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 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 344 KB Output is correct
6 Correct 0 ms 348 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 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 7 ms 2428 KB Output is correct
17 Correct 9 ms 2440 KB Output is correct
18 Correct 10 ms 2652 KB Output is correct
19 Correct 9 ms 2652 KB Output is correct
20 Correct 8 ms 2392 KB Output is correct
21 Correct 11 ms 2788 KB Output is correct
22 Correct 12 ms 2756 KB Output is correct
23 Correct 10 ms 2652 KB Output is correct
24 Correct 8 ms 2384 KB Output is correct
25 Correct 10 ms 2652 KB Output is correct
26 Correct 11 ms 2684 KB Output is correct
27 Correct 11 ms 2652 KB Output is correct
28 Correct 10 ms 2688 KB Output is correct
29 Correct 753 ms 52212 KB Output is correct
30 Correct 687 ms 53072 KB Output is correct
31 Correct 720 ms 54868 KB Output is correct
32 Correct 729 ms 54836 KB Output is correct
33 Correct 667 ms 47956 KB Output is correct
34 Correct 760 ms 55256 KB Output is correct
35 Correct 830 ms 70612 KB Output is correct
36 Correct 788 ms 65452 KB Output is correct
37 Correct 864 ms 70740 KB Output is correct