#include "bits/stdc++.h"
using namespace std;
#define for_(i, s, e) for (int i = s; i < (int) e; i++)
#define for__(i, s, e) for (ll i = s; i < e; i++)
typedef long long ll;
typedef vector<int> vi;
typedef array<int, 2> ii;
#define endl '\n'
int n, m;
vector<vi> mat;
const int INF = 1e9;
int fin;
vi nums;
void solve() {
int l = 0, r = (int) nums.size()-1;
while (r > 0 and nums[r-1]-nums[0] >= fin) r--;
int ans = r;
vi wd(n);
while (l < r) {
int mid = (l+r)/2;
bool valid = true;
for_(i, 0, n) {
int pt = -1;
for_(j, 0, m) {
if (mat[i][j] > nums[mid]) break;
pt = j;
}
if (i > 0) pt = min(pt, wd[i-1]);
wd[i] = pt;
}
int mn = INF;
if (valid) for_(i, 0, n) for_(j, wd[i]+1, m) {
mn = min(mn, mat[i][j]);
}
if (nums.back()-mn > nums[mid]-nums[0]) valid = false;
if (!valid) l = mid+1;
else {
r = ans = mid;
}
}
fin = min(fin, nums[ans]-nums[0]);
}
void rotate() {
vector<vi> temp(m, vi(n));
for (int j = m-1; j >= 0; j--) {
for_(i, 0, n) temp[m-j-1][i] = mat[i][j];
}
swap(n, m);
swap(mat, temp);
}
void rotateAndSolve() {
for_(i, 0, 4) {
solve();
rotate();
}
}
int main() {
#ifdef mlocal
freopen("test.in", "r", stdin);
#endif
ios_base::sync_with_stdio(false);
cin.tie(0);
cin >> n >> m;
mat.resize(n, vi(m)); nums.reserve(n*m);
for_(i, 0, n) for_(j, 0, m) {
cin >> mat[i][j];
nums.push_back(mat[i][j]);
}
sort(nums.begin(), nums.end());
fin = nums.back()-nums[0];
rotateAndSolve();
for_(i, 0, n) for_(j, 0, m) mat[i][j] = -mat[i][j];
reverse(nums.begin(), nums.end());
for_(i, 0, nums.size()) nums[i] = -nums[i];
rotateAndSolve();
cout << fin << endl;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
384 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
384 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
15 ms |
860 KB |
Output is correct |
| 17 |
Correct |
17 ms |
876 KB |
Output is correct |
| 18 |
Correct |
16 ms |
896 KB |
Output is correct |
| 19 |
Correct |
20 ms |
876 KB |
Output is correct |
| 20 |
Correct |
14 ms |
768 KB |
Output is correct |
| 21 |
Correct |
17 ms |
876 KB |
Output is correct |
| 22 |
Correct |
16 ms |
852 KB |
Output is correct |
| 23 |
Correct |
16 ms |
876 KB |
Output is correct |
| 24 |
Correct |
14 ms |
748 KB |
Output is correct |
| 25 |
Correct |
16 ms |
876 KB |
Output is correct |
| 26 |
Correct |
17 ms |
876 KB |
Output is correct |
| 27 |
Correct |
17 ms |
876 KB |
Output is correct |
| 28 |
Correct |
17 ms |
876 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
364 KB |
Output is correct |
| 6 |
Correct |
1 ms |
364 KB |
Output is correct |
| 7 |
Correct |
1 ms |
364 KB |
Output is correct |
| 8 |
Correct |
1 ms |
364 KB |
Output is correct |
| 9 |
Correct |
1 ms |
384 KB |
Output is correct |
| 10 |
Correct |
1 ms |
364 KB |
Output is correct |
| 11 |
Correct |
1 ms |
364 KB |
Output is correct |
| 12 |
Correct |
1 ms |
364 KB |
Output is correct |
| 13 |
Correct |
1 ms |
364 KB |
Output is correct |
| 14 |
Correct |
1 ms |
364 KB |
Output is correct |
| 15 |
Correct |
1 ms |
364 KB |
Output is correct |
| 16 |
Correct |
15 ms |
860 KB |
Output is correct |
| 17 |
Correct |
17 ms |
876 KB |
Output is correct |
| 18 |
Correct |
16 ms |
896 KB |
Output is correct |
| 19 |
Correct |
20 ms |
876 KB |
Output is correct |
| 20 |
Correct |
14 ms |
768 KB |
Output is correct |
| 21 |
Correct |
17 ms |
876 KB |
Output is correct |
| 22 |
Correct |
16 ms |
852 KB |
Output is correct |
| 23 |
Correct |
16 ms |
876 KB |
Output is correct |
| 24 |
Correct |
14 ms |
748 KB |
Output is correct |
| 25 |
Correct |
16 ms |
876 KB |
Output is correct |
| 26 |
Correct |
17 ms |
876 KB |
Output is correct |
| 27 |
Correct |
17 ms |
876 KB |
Output is correct |
| 28 |
Correct |
17 ms |
876 KB |
Output is correct |
| 29 |
Correct |
1917 ms |
45140 KB |
Output is correct |
| 30 |
Correct |
1905 ms |
44372 KB |
Output is correct |
| 31 |
Correct |
2100 ms |
47608 KB |
Output is correct |
| 32 |
Correct |
2094 ms |
47528 KB |
Output is correct |
| 33 |
Correct |
1685 ms |
41604 KB |
Output is correct |
| 34 |
Correct |
2045 ms |
47620 KB |
Output is correct |
| 35 |
Correct |
2285 ms |
47440 KB |
Output is correct |
| 36 |
Correct |
1869 ms |
41708 KB |
Output is correct |
| 37 |
Correct |
2198 ms |
47620 KB |
Output is correct |
