#include <iostream>
#define ericxiao ios_base::sync_with_stdio(0);cin.tie(0);
using namespace std;
const int maxN = 2e3 + 326, INF = 2e9 + 326;
int N, M, arr[maxN][maxN], narr[maxN][maxN], mx[maxN][maxN], mn[maxN][maxN], MX = -INF, MN = INF, ans = INF;
inline void rot(){
for(int i = 0; i < N; i++) for(int j = 0; j < M; j++){
narr[j][N - 1 - i] = arr[i][j];
}
swap(N, M);
for(int i = 0; i < N; i++) for(int j = 0; j < M; j++) arr[i][j] = narr[i][j];
}
int main(){
ericxiao;
cin >> N >> M;
for(int i = 0; i < N; i++) for(int j = 0; j < M; j++){
cin >> arr[i][j];
MX = max(MX, arr[i][j]);
MN = min(MN, arr[i][j]);
}
for(int jizz = 0; jizz < 4; jizz++){
int _ans = 0;
for(int i = 0; i < N; i++){
for(int j = 0; j < M; j++){
mx[i][j] = arr[i][j];
if(i){
mx[i][j] = max(mx[i][j], mx[i - 1][j]);
}
if(j){
mx[i][j] = max(mx[i][j], mx[i][j - 1]);
}
}
}
for(int i = N - 1; i >= 0; i--){
for(int j = M - 1; j >= 0; j--){
mn[i][j] = arr[i][j];
if(i < N - 2){
mn[i][j] = min(mn[i][j], mn[i + 1][j]);
}
if(j < M - 2){
mn[i][j] = min(mn[i][j], mn[i][j + 1]);
}
}
}
for(int i = 0; i < N; i++){
for(int j = 0; j < M; j++){
_ans = max(_ans, min(MX - mn[i][j], mx[i][j] - MN));
}
}
ans = min(ans, _ans);
rot();
}
cout << ans << endl;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
492 KB |
Output is correct |
| 2 |
Correct |
1 ms |
512 KB |
Output is correct |
| 3 |
Correct |
1 ms |
492 KB |
Output is correct |
| 4 |
Correct |
1 ms |
492 KB |
Output is correct |
| 5 |
Correct |
1 ms |
492 KB |
Output is correct |
| 6 |
Correct |
1 ms |
492 KB |
Output is correct |
| 7 |
Correct |
1 ms |
492 KB |
Output is correct |
| 8 |
Correct |
1 ms |
492 KB |
Output is correct |
| 9 |
Correct |
1 ms |
492 KB |
Output is correct |
| 10 |
Correct |
1 ms |
492 KB |
Output is correct |
| 11 |
Correct |
1 ms |
492 KB |
Output is correct |
| 12 |
Correct |
1 ms |
492 KB |
Output is correct |
| 13 |
Correct |
1 ms |
492 KB |
Output is correct |
| 14 |
Correct |
1 ms |
492 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
492 KB |
Output is correct |
| 2 |
Correct |
1 ms |
512 KB |
Output is correct |
| 3 |
Correct |
1 ms |
492 KB |
Output is correct |
| 4 |
Correct |
1 ms |
492 KB |
Output is correct |
| 5 |
Correct |
1 ms |
492 KB |
Output is correct |
| 6 |
Correct |
1 ms |
492 KB |
Output is correct |
| 7 |
Correct |
1 ms |
492 KB |
Output is correct |
| 8 |
Correct |
1 ms |
492 KB |
Output is correct |
| 9 |
Correct |
1 ms |
492 KB |
Output is correct |
| 10 |
Correct |
1 ms |
492 KB |
Output is correct |
| 11 |
Correct |
1 ms |
492 KB |
Output is correct |
| 12 |
Correct |
1 ms |
492 KB |
Output is correct |
| 13 |
Correct |
1 ms |
492 KB |
Output is correct |
| 14 |
Correct |
1 ms |
492 KB |
Output is correct |
| 15 |
Correct |
3 ms |
3692 KB |
Output is correct |
| 16 |
Correct |
8 ms |
4228 KB |
Output is correct |
| 17 |
Correct |
8 ms |
4204 KB |
Output is correct |
| 18 |
Correct |
8 ms |
4204 KB |
Output is correct |
| 19 |
Correct |
8 ms |
4224 KB |
Output is correct |
| 20 |
Correct |
7 ms |
4204 KB |
Output is correct |
| 21 |
Correct |
9 ms |
4204 KB |
Output is correct |
| 22 |
Correct |
11 ms |
4204 KB |
Output is correct |
| 23 |
Correct |
9 ms |
4204 KB |
Output is correct |
| 24 |
Correct |
9 ms |
4204 KB |
Output is correct |
| 25 |
Correct |
12 ms |
4204 KB |
Output is correct |
| 26 |
Correct |
9 ms |
4204 KB |
Output is correct |
| 27 |
Correct |
9 ms |
4204 KB |
Output is correct |
| 28 |
Correct |
9 ms |
4204 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
492 KB |
Output is correct |
| 2 |
Correct |
1 ms |
512 KB |
Output is correct |
| 3 |
Correct |
1 ms |
492 KB |
Output is correct |
| 4 |
Correct |
1 ms |
492 KB |
Output is correct |
| 5 |
Correct |
1 ms |
492 KB |
Output is correct |
| 6 |
Correct |
1 ms |
492 KB |
Output is correct |
| 7 |
Correct |
1 ms |
492 KB |
Output is correct |
| 8 |
Correct |
1 ms |
492 KB |
Output is correct |
| 9 |
Correct |
1 ms |
492 KB |
Output is correct |
| 10 |
Correct |
1 ms |
492 KB |
Output is correct |
| 11 |
Correct |
1 ms |
492 KB |
Output is correct |
| 12 |
Correct |
1 ms |
492 KB |
Output is correct |
| 13 |
Correct |
1 ms |
492 KB |
Output is correct |
| 14 |
Correct |
1 ms |
492 KB |
Output is correct |
| 15 |
Correct |
3 ms |
3692 KB |
Output is correct |
| 16 |
Correct |
8 ms |
4228 KB |
Output is correct |
| 17 |
Correct |
8 ms |
4204 KB |
Output is correct |
| 18 |
Correct |
8 ms |
4204 KB |
Output is correct |
| 19 |
Correct |
8 ms |
4224 KB |
Output is correct |
| 20 |
Correct |
7 ms |
4204 KB |
Output is correct |
| 21 |
Correct |
9 ms |
4204 KB |
Output is correct |
| 22 |
Correct |
11 ms |
4204 KB |
Output is correct |
| 23 |
Correct |
9 ms |
4204 KB |
Output is correct |
| 24 |
Correct |
9 ms |
4204 KB |
Output is correct |
| 25 |
Correct |
12 ms |
4204 KB |
Output is correct |
| 26 |
Correct |
9 ms |
4204 KB |
Output is correct |
| 27 |
Correct |
9 ms |
4204 KB |
Output is correct |
| 28 |
Correct |
9 ms |
4204 KB |
Output is correct |
| 29 |
Correct |
691 ms |
73516 KB |
Output is correct |
| 30 |
Correct |
659 ms |
73324 KB |
Output is correct |
| 31 |
Correct |
754 ms |
73196 KB |
Output is correct |
| 32 |
Correct |
723 ms |
73196 KB |
Output is correct |
| 33 |
Correct |
644 ms |
72812 KB |
Output is correct |
| 34 |
Correct |
737 ms |
73336 KB |
Output is correct |
| 35 |
Correct |
816 ms |
73356 KB |
Output is correct |
| 36 |
Correct |
729 ms |
106476 KB |
Output is correct |
| 37 |
Correct |
852 ms |
112620 KB |
Output is correct |
