#include <bits/stdc++.h>
using namespace std;
const int N = 2e3+5;
int h, w, mn, mx;
int A[N][N], ans = 1e9;
void solve() {
int l = 0, r = mx - mn;
while(l <= r) {
int mid = (l + r) >> 1;
int pos = 0, valid = 1;
for(int i = 1; i <= h; i++) {
for(int j = 1; j <= w; j++) if(mx - A[i][j] > mid)
pos = max(pos, j);
for(int j = 1; j <= w; j++) if(A[i][j] - mn > mid)
if(j <= pos) valid = 0;
}
if(valid) r = mid - 1, ans = min(ans, mid);
else l = mid + 1;
}
}
void flip_col() {
for(int i = 1; i <= h; i++)
for(int j = 1; j <= w / 2; j++)
swap(A[i][j], A[i][w - j + 1]);
}
void flip_row() {
for(int j = 1; j <= w; j++)
for(int i = 1; i <= h / 2; i++)
swap(A[i][j], A[h - i + 1][j]);
}
int main() {
scanf("%d %d", &h, &w);
mn = 1e9, mx = -1e9;
for(int i = 1; i <= h; i++) for(int j = 1; j <= w; j++) {
scanf("%d", A[i] + j);
mn = min(mn, A[i][j]);
mx = max(mx, A[i][j]);
}
solve();
flip_col(), solve();
flip_row(), solve();
flip_col(), solve();
printf("%d\n", ans);
return 0;
}
Compilation message
joioi.cpp: In function 'int main()':
joioi.cpp:39:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &h, &w);
~~~~~^~~~~~~~~~~~~~~~~
joioi.cpp:42:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", A[i] + j);
~~~~~^~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
384 KB |
Output is correct |
| 2 |
Correct |
5 ms |
256 KB |
Output is correct |
| 3 |
Correct |
5 ms |
384 KB |
Output is correct |
| 4 |
Correct |
5 ms |
384 KB |
Output is correct |
| 5 |
Correct |
5 ms |
384 KB |
Output is correct |
| 6 |
Correct |
5 ms |
384 KB |
Output is correct |
| 7 |
Correct |
5 ms |
384 KB |
Output is correct |
| 8 |
Correct |
5 ms |
420 KB |
Output is correct |
| 9 |
Correct |
5 ms |
384 KB |
Output is correct |
| 10 |
Correct |
5 ms |
384 KB |
Output is correct |
| 11 |
Correct |
5 ms |
384 KB |
Output is correct |
| 12 |
Correct |
5 ms |
384 KB |
Output is correct |
| 13 |
Correct |
5 ms |
512 KB |
Output is correct |
| 14 |
Correct |
5 ms |
384 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
384 KB |
Output is correct |
| 2 |
Correct |
5 ms |
256 KB |
Output is correct |
| 3 |
Correct |
5 ms |
384 KB |
Output is correct |
| 4 |
Correct |
5 ms |
384 KB |
Output is correct |
| 5 |
Correct |
5 ms |
384 KB |
Output is correct |
| 6 |
Correct |
5 ms |
384 KB |
Output is correct |
| 7 |
Correct |
5 ms |
384 KB |
Output is correct |
| 8 |
Correct |
5 ms |
420 KB |
Output is correct |
| 9 |
Correct |
5 ms |
384 KB |
Output is correct |
| 10 |
Correct |
5 ms |
384 KB |
Output is correct |
| 11 |
Correct |
5 ms |
384 KB |
Output is correct |
| 12 |
Correct |
5 ms |
384 KB |
Output is correct |
| 13 |
Correct |
5 ms |
512 KB |
Output is correct |
| 14 |
Correct |
5 ms |
384 KB |
Output is correct |
| 15 |
Correct |
5 ms |
384 KB |
Output is correct |
| 16 |
Correct |
14 ms |
1408 KB |
Output is correct |
| 17 |
Correct |
23 ms |
1664 KB |
Output is correct |
| 18 |
Correct |
21 ms |
1536 KB |
Output is correct |
| 19 |
Correct |
24 ms |
1536 KB |
Output is correct |
| 20 |
Correct |
22 ms |
1408 KB |
Output is correct |
| 21 |
Correct |
28 ms |
1664 KB |
Output is correct |
| 22 |
Correct |
27 ms |
1664 KB |
Output is correct |
| 23 |
Correct |
30 ms |
1664 KB |
Output is correct |
| 24 |
Correct |
24 ms |
1664 KB |
Output is correct |
| 25 |
Correct |
31 ms |
1664 KB |
Output is correct |
| 26 |
Correct |
28 ms |
1664 KB |
Output is correct |
| 27 |
Correct |
28 ms |
1664 KB |
Output is correct |
| 28 |
Correct |
28 ms |
1664 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
384 KB |
Output is correct |
| 2 |
Correct |
5 ms |
256 KB |
Output is correct |
| 3 |
Correct |
5 ms |
384 KB |
Output is correct |
| 4 |
Correct |
5 ms |
384 KB |
Output is correct |
| 5 |
Correct |
5 ms |
384 KB |
Output is correct |
| 6 |
Correct |
5 ms |
384 KB |
Output is correct |
| 7 |
Correct |
5 ms |
384 KB |
Output is correct |
| 8 |
Correct |
5 ms |
420 KB |
Output is correct |
| 9 |
Correct |
5 ms |
384 KB |
Output is correct |
| 10 |
Correct |
5 ms |
384 KB |
Output is correct |
| 11 |
Correct |
5 ms |
384 KB |
Output is correct |
| 12 |
Correct |
5 ms |
384 KB |
Output is correct |
| 13 |
Correct |
5 ms |
512 KB |
Output is correct |
| 14 |
Correct |
5 ms |
384 KB |
Output is correct |
| 15 |
Correct |
5 ms |
384 KB |
Output is correct |
| 16 |
Correct |
14 ms |
1408 KB |
Output is correct |
| 17 |
Correct |
23 ms |
1664 KB |
Output is correct |
| 18 |
Correct |
21 ms |
1536 KB |
Output is correct |
| 19 |
Correct |
24 ms |
1536 KB |
Output is correct |
| 20 |
Correct |
22 ms |
1408 KB |
Output is correct |
| 21 |
Correct |
28 ms |
1664 KB |
Output is correct |
| 22 |
Correct |
27 ms |
1664 KB |
Output is correct |
| 23 |
Correct |
30 ms |
1664 KB |
Output is correct |
| 24 |
Correct |
24 ms |
1664 KB |
Output is correct |
| 25 |
Correct |
31 ms |
1664 KB |
Output is correct |
| 26 |
Correct |
28 ms |
1664 KB |
Output is correct |
| 27 |
Correct |
28 ms |
1664 KB |
Output is correct |
| 28 |
Correct |
28 ms |
1664 KB |
Output is correct |
| 29 |
Correct |
1524 ms |
37368 KB |
Output is correct |
| 30 |
Correct |
1531 ms |
37624 KB |
Output is correct |
| 31 |
Correct |
1768 ms |
39160 KB |
Output is correct |
| 32 |
Correct |
1587 ms |
39160 KB |
Output is correct |
| 33 |
Correct |
1286 ms |
34172 KB |
Output is correct |
| 34 |
Correct |
1707 ms |
39288 KB |
Output is correct |
| 35 |
Correct |
2289 ms |
54776 KB |
Output is correct |
| 36 |
Correct |
1779 ms |
49656 KB |
Output is correct |
| 37 |
Correct |
2435 ms |
54904 KB |
Output is correct |
