oj.uz

Submission #849498

# Submission time Handle Problem Language Result Execution time Memory
849498 2023-09-14T17:02:57 Z qthang2k11 The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 470 ms 55140 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 2003, MAX = 1e9;

int m, n, a[N][N], mi = MAX, mx = 0, ans = MAX;

bool ok(int f) {
	int lst = n;
	for (int i = 1; i <= m; i++) {
		for (int j = 0; j < lst; j++) {
			if (mi + f < a[i][j + 1]) {
				lst = j;
				break;
			}
		}
		for (int j = n; j > lst; j--) 
			if (mx - f > a[i][j])
				return false;
	}
	return true;
}

void deal() {
	int l = 0, r = ans;
	while (l <= r) {
		int mid = (l + r) / 2;
		if (ok(mid)) {
			ans = mid;
			r = mid - 1;
		} else l = mid + 1;
	}
}

void flip_col() {
	for (int i = m / 2; i > 0; i--)
		for (int j = 1; j <= n; j++)
			swap(a[i][j], a[m - i + 1][j]);
}

void flip_row() {
	for (int i = 1; i <= m; i++)
		for (int j = n / 2; j > 0; j--)
			swap(a[i][j], a[i][n - j + 1]);
}

int32_t main() {
	cin.tie(0)->sync_with_stdio(0);
	cin >> m >> n;
	for (int i = 1; i <= m; i++) {
		for (int j = 1; j <= n; j++) {
			cin >> a[i][j];
			mi = min(mi, a[i][j]);
			mx = max(mx, a[i][j]);
		}
	}
	ans = mx - mi;
	deal();
	flip_col();
	deal();
	flip_row();
	deal();
	flip_col();
	deal();
	cout << ans;
	return 0;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 3 ms 2648 KB Output is correct
17 Correct 3 ms 2648 KB Output is correct
18 Correct 3 ms 2652 KB Output is correct
19 Correct 4 ms 2648 KB Output is correct
20 Correct 3 ms 2648 KB Output is correct
21 Correct 4 ms 2904 KB Output is correct
22 Correct 4 ms 2908 KB Output is correct
23 Correct 5 ms 2904 KB Output is correct
24 Correct 4 ms 2904 KB Output is correct
25 Correct 5 ms 2904 KB Output is correct
26 Correct 4 ms 2908 KB Output is correct
27 Correct 5 ms 2904 KB Output is correct
28 Correct 5 ms 2908 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 3 ms 2648 KB Output is correct
17 Correct 3 ms 2648 KB Output is correct
18 Correct 3 ms 2652 KB Output is correct
19 Correct 4 ms 2648 KB Output is correct
20 Correct 3 ms 2648 KB Output is correct
21 Correct 4 ms 2904 KB Output is correct
22 Correct 4 ms 2908 KB Output is correct
23 Correct 5 ms 2904 KB Output is correct
24 Correct 4 ms 2904 KB Output is correct
25 Correct 5 ms 2904 KB Output is correct
26 Correct 4 ms 2908 KB Output is correct
27 Correct 5 ms 2904 KB Output is correct
28 Correct 5 ms 2908 KB Output is correct
29 Correct 233 ms 37200 KB Output is correct
30 Correct 241 ms 37536 KB Output is correct
31 Correct 247 ms 39200 KB Output is correct
32 Correct 253 ms 39316 KB Output is correct
33 Correct 212 ms 34896 KB Output is correct
34 Correct 249 ms 39284 KB Output is correct
35 Correct 350 ms 54896 KB Output is correct
36 Correct 470 ms 49392 KB Output is correct
37 Correct 367 ms 55140 KB Output is correct