oj.uz

Submission #757104

# Submission time Handle Problem Language Result Execution time Memory
757104 2023-06-12T16:09:39 Z gun_gan The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 704 ms 17180 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

const int MX = 2005;

int a[MX][MX];
int H, W, mn = 1e9, mx = 0;

bool can(int x) {
      // cek atas kanan
      int lst = W - 1;
      bool ok = 1;
      for(int i = 0; i < H; i++) {
            for(int j = 0; j <= lst; j++) {
                  if(a[i][j] > mn + x) {
                        lst = j - 1;
                        break;
                  }
            }

            for(int j = lst + 1; j < W; j++) {
                  ok &= a[i][j] >= mx - x;
            }
      }

      if(ok) return 1;
      ok = 1;
      lst = 0;

      for(int i = 0; i < H; i++) {
            for(int j = W - 1; j >= lst; j--) {
                  if(a[i][j] > mn + x) {
                        lst = j + 1;
                        break;
                  }
            }

            for(int j = 0; j < lst; j++) {
                  ok &= a[i][j] >= mx - x;
            }
      }

      if(ok) return 1;

      ok = 1;
      lst = W - 1;
      for(int i = H - 1; i >= 0; i--) {
            for(int j = 0; j <= lst; j++) {
                  if(a[i][j] > mn + x) {
                        lst = j - 1;
                        break;     
                  }
            }

            for(int j = lst + 1; j < W; j++) {
                  ok &= a[i][j] >= mx - x;
            }
      }

      if(ok) return 1;

      ok = 1;
      lst = 0;
      for(int i = H - 1; i >= 0; i--) {
            for(int j = W - 1; j >= lst; j--) {
                  if(a[i][j] > mn + x) {
                        lst = j + 1;
                        break;
                  }
            }

            for(int j = 0; j < lst; j++) {
                  ok &= a[i][j] >= mx - x;
            }
      }
      
      return ok;
}

int main() {
      ios_base::sync_with_stdio(0); cin.tie(0); 

      cin >> H >> W;
      for(int i = 0; i < H; i++) {
            for(int j = 0; j < W; j++) {
                  cin >> a[i][j];
                  mn = min(mn, a[i][j]);
                  mx = max(mx, a[i][j]);
            }
      }

      int l = 0, r = 1e9, ans = 0;
      while(l <= r) {
            int mid = (l + r) >> 1;
            if(can(mid)) {
                  r = mid - 1, ans = mid;
            } else {
                  l = mid + 1;
            }
      }
      
      cout << ans << '\n';
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 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 328 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 324 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 324 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 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 328 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 324 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 324 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 5 ms 1276 KB Output is correct
17 Correct 6 ms 1492 KB Output is correct
18 Correct 7 ms 1432 KB Output is correct
19 Correct 7 ms 1492 KB Output is correct
20 Correct 6 ms 1364 KB Output is correct
21 Correct 10 ms 1620 KB Output is correct
22 Correct 9 ms 1620 KB Output is correct
23 Correct 7 ms 1620 KB Output is correct
24 Correct 6 ms 1492 KB Output is correct
25 Correct 8 ms 1588 KB Output is correct
26 Correct 9 ms 1620 KB Output is correct
27 Correct 9 ms 1608 KB Output is correct
28 Correct 8 ms 1620 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 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 328 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 324 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 324 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 5 ms 1276 KB Output is correct
17 Correct 6 ms 1492 KB Output is correct
18 Correct 7 ms 1432 KB Output is correct
19 Correct 7 ms 1492 KB Output is correct
20 Correct 6 ms 1364 KB Output is correct
21 Correct 10 ms 1620 KB Output is correct
22 Correct 9 ms 1620 KB Output is correct
23 Correct 7 ms 1620 KB Output is correct
24 Correct 6 ms 1492 KB Output is correct
25 Correct 8 ms 1588 KB Output is correct
26 Correct 9 ms 1620 KB Output is correct
27 Correct 9 ms 1608 KB Output is correct
28 Correct 8 ms 1620 KB Output is correct
29 Correct 434 ms 15600 KB Output is correct
30 Correct 476 ms 16440 KB Output is correct
31 Correct 466 ms 16476 KB Output is correct
32 Correct 485 ms 16460 KB Output is correct
33 Correct 381 ms 14628 KB Output is correct
34 Correct 466 ms 16500 KB Output is correct
35 Correct 686 ms 17180 KB Output is correct
36 Correct 591 ms 16828 KB Output is correct
37 Correct 704 ms 17136 KB Output is correct