oj.uz

Submission #262971

# Submission time Handle Problem Language Result Execution time Memory
262971 2020-08-13T11:34:35 Z sahil_k The Kingdom of JOIOI (JOI17_joioi) C++14
60 / 100
 4000 ms 55116 KB 
#include <iostream>
using namespace std;
#define MAXN 2005
int n, m;
int grid[MAXN][MAXN];
int min_v = 1e9, max_v = -1;
bool check (int x) {
	int pos = m;
	int cur = max_v;
	for (int i=0; i<n; i++) {
		for (int j=0; j<pos; j++) {
			if (grid[i][j]-min_v > x) {
				pos = j;
				break;
			}
		}
		for (int j=pos; j<m; j++) {
			cur = min(cur, grid[i][j]);
		}
	}
	if (max_v-cur <= x) return true;
	pos = m;
	cur = max_v;
	for (int i=n-1; i>=0; i--) {
		for (int j=0; j<pos; j++) {
			if (grid[i][j]-min_v > x) {
				pos = j;
				break;
			}
		}
		for (int j=pos; j<m; j++) {
			cur = min(cur, grid[i][j]);
		}
	}
	if (max_v-cur <= x) return true;
	pos = -1;
	cur = max_v;
	for (int i=0; i<n; i++) {
		for (int j=m-1; j>pos; j--) {
			if (grid[i][j]-min_v > x) {
				pos = j;
				break;
			}
		}
		for (int j=pos; j>=0; j--) {
			cur = min(cur, grid[i][j]);
		}
	}
	if (max_v-cur <= x) return true;
	pos = -1;
	cur = max_v;
	for (int i=n-1; i>=0; i--) {
		for (int j=m-1; j>pos; j--) {
			if (grid[i][j]-min_v > x) {
				pos = j;
				break;
			}
		}
		for (int j=pos; j>=0; j--) {
			cur = min(cur, grid[i][j]);
		}
	}
	if (max_v-cur <= x) return true;
	return false;
}
int main () {
	cin >> n >> m;
	for (int i=0; i<n; i++) {
		for (int j=0; j<m; j++) {
			cin >> grid[i][j];
			min_v = min(min_v, grid[i][j]);
			max_v = max(max_v, grid[i][j]);
		}
	}
	int l = 0, r = 1e9, m, o;
	while (l <= r) {
		m = (l+r)/2;
		if (check(m)) {
			r = m-1; o = m;
		} else {
			l = m+1;
		}
	}
	cout << o << endl;
}

Compilation message

joioi.cpp: In function 'int main()':
joioi.cpp:84:10: warning: 'o' may be used uninitialized in this function [-Wmaybe-uninitialized]
   84 |  cout << o << endl;
      |          ^

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 372 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 372 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 12 ms 1280 KB Output is correct
17 Correct 28 ms 1536 KB Output is correct
18 Correct 29 ms 1536 KB Output is correct
19 Correct 30 ms 1528 KB Output is correct
20 Correct 28 ms 1408 KB Output is correct
21 Correct 39 ms 1660 KB Output is correct
22 Correct 40 ms 1656 KB Output is correct
23 Correct 39 ms 1632 KB Output is correct
24 Correct 34 ms 1512 KB Output is correct
25 Correct 41 ms 1604 KB Output is correct
26 Correct 43 ms 1660 KB Output is correct
27 Correct 44 ms 1720 KB Output is correct
28 Correct 39 ms 1656 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 372 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 12 ms 1280 KB Output is correct
17 Correct 28 ms 1536 KB Output is correct
18 Correct 29 ms 1536 KB Output is correct
19 Correct 30 ms 1528 KB Output is correct
20 Correct 28 ms 1408 KB Output is correct
21 Correct 39 ms 1660 KB Output is correct
22 Correct 40 ms 1656 KB Output is correct
23 Correct 39 ms 1632 KB Output is correct
24 Correct 34 ms 1512 KB Output is correct
25 Correct 41 ms 1604 KB Output is correct
26 Correct 43 ms 1660 KB Output is correct
27 Correct 44 ms 1720 KB Output is correct
28 Correct 39 ms 1656 KB Output is correct
29 Correct 2412 ms 37468 KB Output is correct
30 Correct 2454 ms 37624 KB Output is correct
31 Correct 2494 ms 39332 KB Output is correct
32 Correct 2551 ms 39476 KB Output is correct
33 Correct 2177 ms 34320 KB Output is correct
34 Correct 2612 ms 39480 KB Output is correct
35 Correct 3768 ms 55116 KB Output is correct
36 Correct 3359 ms 49636 KB Output is correct
37 Execution timed out 4022 ms 54988 KB Time limit exceeded