oj.uz

Submission #631201

# Submission time Handle Problem Language Result Execution time Memory
631201 2022-08-17T19:46:51 Z Abrar_Al_Samit The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 1304 ms 70572 KB 
#include<bits/stdc++.h>
using namespace std;

const int MX = 2005;
const int INF = 1e9;

int a[MX][MX];
int n, m;
int mn, mx;
int mark[MX][MX];

bool can(int ans, bool tag) {
  for(int i=0; i<n; ++i) {
    for(int j=0; j<m; ++j) {
      mark[i][j] = -1;
      if(a[i][j]-mn>ans) {
        mark[i][j] = tag;
      }
      if(mx-a[i][j]>ans) {
        if(mark[i][j]!=-1) return false;
        mark[i][j] = tag^1;
      }
    }
  }

  auto LEFT_RIGHT_DIAGONAL = [&] () {
    int prev = INF;
    for(int i=0; i<n; ++i) {
      int upto = m;
      bool zero = false;
      for(int j=m-1; j>-1; --j) {
        if(mark[i][j]==0) {
          zero = true;
          if(j>prev) return false;
          continue;
        }
        if(mark[i][j]==1) {
          if(zero) return false;
          upto = j;
        }
      }
      prev = min(prev, upto-1);
    }
    return true;
  };
  auto RIGHT_LEFT_DIAGONAL = [&] () {
    int prev = -1;
    for(int i=0; i<n; ++i) {
      int upto = -1;
      bool one = false;
      for(int j=0; j<m; ++j) {
        if(mark[i][j]==1) {
          one = true;
          if(j<prev) return false;
          continue;
        }
        if(mark[i][j]==0) {
          if(one) return false;
          upto = j;
        }
      }
      prev = max(prev, upto+1);
    }
    return true;
  };
  return (LEFT_RIGHT_DIAGONAL()|(RIGHT_LEFT_DIAGONAL()));
}
void PlayGround() {
  cin>>n>>m;
  mx = -1, mn = INF;
  for(int i=0; i<n; ++i) {
    for(int j=0; j<m; ++j) {
      cin>>a[i][j];
      mn = min(mn, a[i][j]);
      mx = max(mx, a[i][j]);
    }
  }

  int l = 0, r = 1e9;
  while(l<r) {
    int mid = (l+r)/2;
    if(can(mid, 0) || can(mid, 1)) r = mid;
    else l = mid+1;
  }
  cout<<l<<'\n';
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  PlayGround();
  return 0;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 332 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 0 ms 328 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 336 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 1 ms 332 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 0 ms 340 KB Output is correct
2 Correct 1 ms 332 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 0 ms 328 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 336 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 6 ms 2308 KB Output is correct
17 Correct 9 ms 2588 KB Output is correct
18 Correct 8 ms 2516 KB Output is correct
19 Correct 11 ms 2528 KB Output is correct
20 Correct 10 ms 2260 KB Output is correct
21 Correct 10 ms 2644 KB Output is correct
22 Correct 6 ms 2516 KB Output is correct
23 Correct 12 ms 2640 KB Output is correct
24 Correct 6 ms 2388 KB Output is correct
25 Correct 16 ms 2516 KB Output is correct
26 Correct 9 ms 2644 KB Output is correct
27 Correct 10 ms 2648 KB Output is correct
28 Correct 11 ms 2644 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 332 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 0 ms 328 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 336 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 6 ms 2308 KB Output is correct
17 Correct 9 ms 2588 KB Output is correct
18 Correct 8 ms 2516 KB Output is correct
19 Correct 11 ms 2528 KB Output is correct
20 Correct 10 ms 2260 KB Output is correct
21 Correct 10 ms 2644 KB Output is correct
22 Correct 6 ms 2516 KB Output is correct
23 Correct 12 ms 2640 KB Output is correct
24 Correct 6 ms 2388 KB Output is correct
25 Correct 16 ms 2516 KB Output is correct
26 Correct 9 ms 2644 KB Output is correct
27 Correct 10 ms 2648 KB Output is correct
28 Correct 11 ms 2644 KB Output is correct
29 Correct 780 ms 52228 KB Output is correct
30 Correct 939 ms 53324 KB Output is correct
31 Correct 1187 ms 54828 KB Output is correct
32 Correct 607 ms 54816 KB Output is correct
33 Correct 486 ms 48024 KB Output is correct
34 Correct 938 ms 54916 KB Output is correct
35 Correct 767 ms 70440 KB Output is correct
36 Correct 431 ms 65224 KB Output is correct
37 Correct 1304 ms 70572 KB Output is correct