oj.uz

Submission #837194

# Submission time Handle Problem Language Result Execution time Memory
837194 2023-08-25T07:49:52 Z gustason The Kingdom of JOIOI (JOI17_joioi) C++14
100 / 100
 618 ms 31692 KB 
#include <bits/stdc++.h>

using namespace std;
const int nax = 2001;
const int max_a = 1000000000;
int mat[nax][nax];
bool curr[nax][nax];

int mn = max_a, mx = 0;
int n, m;

void print() {
	for(int i = 0; i < n; i++) {
		for(int j = 0; j < m; j++) {
			cout << mat[i][j] << " ";
		}
		cout << "\n";
	}
	cout << "\n";
}

void mini(int& a, int b) {
	a = min(a, b);
}

bool gali(int k) {
	int idx = 0;
	for(int i = 0; i < n; i++) {
		for(int j = 0; j < m; j++) {
			// max priklauso [mx-k, mx]
			if (mx - k > mat[i][j]) {
				// (i, j) butinai priklauso TIK minimumams	
				idx = max(idx, j+1);
			}
		}
		
		// visi tarp tures buti minimumai [mn, mn+k]
		for(int j = 0; j < idx; j++) {
			if (mat[i][j] > mn + k) {
				return false;
			}
		}
	}
	return true;	
}

void flip1() {
	int aux[m][n];
	for(int i = 0; i < m; i++) {
		for(int j = 0; j < n; j++) {
			aux[i][j] = mat[j][m-i-1];
			//cout << i << " " << j << ": " << j << " " << n-i-1 << " " << aux[i][j] << "\n";
		}
	}
	swap(n, m);
	for(int i = 0; i < n; i++) {
		for(int j = 0; j < m; j++){
			mat[i][j] = aux[i][j];
		}
	}
}

int go() {
	int l = 0, r = max_a, ans = max_a;
	while(l <= r) {
		int mid = (l + r) / 2;
		if (gali(mid)) {
			ans = mid;
			r = mid - 1;
		}
		else {
			l = mid + 1;
		}
	}
	return ans;
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	
	cin >> n >> m;

	for(int i = 0; i < n; i++) {
		for(int j = 0; j < m; j++) {
			cin >> mat[i][j];
		}
	}
	
	for(int i = 0; i < n; i++) {
		for(int j = 0; j < m; j++) {
			mn = min(mn, mat[i][j]);
			mx = max(mx, mat[i][j]);
		}
	}
	
	//cout << mn << " " << mx << "\n";
	int ans = go();
	flip1();
	//print();
	mini(ans, go());
	
	flip1();
	//print();
	mini(ans, go());
	
	flip1();
	//print();
	mini(ans, go());
	
	cout << ans << "\n";
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 2 ms 1108 KB Output is correct
16 Correct 5 ms 1364 KB Output is correct
17 Correct 6 ms 1364 KB Output is correct
18 Correct 6 ms 1364 KB Output is correct
19 Correct 6 ms 1364 KB Output is correct
20 Correct 6 ms 1364 KB Output is correct
21 Correct 6 ms 1364 KB Output is correct
22 Correct 6 ms 1364 KB Output is correct
23 Correct 9 ms 1364 KB Output is correct
24 Correct 5 ms 1488 KB Output is correct
25 Correct 9 ms 1364 KB Output is correct
26 Correct 6 ms 1364 KB Output is correct
27 Correct 6 ms 1364 KB Output is correct
28 Correct 6 ms 1364 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 2 ms 1108 KB Output is correct
16 Correct 5 ms 1364 KB Output is correct
17 Correct 6 ms 1364 KB Output is correct
18 Correct 6 ms 1364 KB Output is correct
19 Correct 6 ms 1364 KB Output is correct
20 Correct 6 ms 1364 KB Output is correct
21 Correct 6 ms 1364 KB Output is correct
22 Correct 6 ms 1364 KB Output is correct
23 Correct 9 ms 1364 KB Output is correct
24 Correct 5 ms 1488 KB Output is correct
25 Correct 9 ms 1364 KB Output is correct
26 Correct 6 ms 1364 KB Output is correct
27 Correct 6 ms 1364 KB Output is correct
28 Correct 6 ms 1364 KB Output is correct
29 Correct 521 ms 30932 KB Output is correct
30 Correct 525 ms 30572 KB Output is correct
31 Correct 605 ms 31660 KB Output is correct
32 Correct 560 ms 31592 KB Output is correct
33 Correct 476 ms 29508 KB Output is correct
34 Correct 618 ms 31692 KB Output is correct
35 Correct 537 ms 31544 KB Output is correct
36 Correct 485 ms 29528 KB Output is correct
37 Correct 614 ms 31636 KB Output is correct