oj.uz

Submission #536162

# Submission time Handle Problem Language Result Execution time Memory
536162 2022-03-12T14:31:18 Z cig32 Maxcomp (info1cup18_maxcomp) C++17
60 / 100
 500 ms 26444 KB 
#include "bits/stdc++.h"
using namespace std;
const int MAXN = 2e5 + 10;
const int MOD = 1e9 + 7;
#define int long long
mt19937_64 rng((int)std::chrono::steady_clock::now().time_since_epoch().count());
int rnd(int x, int y) {
  int u = uniform_int_distribution<int>(x, y)(rng); return u;
}

void solve(int tc) {
  int n, m;
  cin >> n >> m;
  int a[n+1][m+1];
  for(int i=1; i<=n; i++) {
    for(int j=1; j<=m; j++) {
      cin >> a[i][j];
    }
  }
  int ans = -1e9;
  for(int i=1; i<=n; i++) {
    for(int j=1; j<=m; j++) {
      int mi = a[i][j];
      bool can[n*m + 1];
      for(int k=1; k<=n; k++) {
        for(int l=1; l<=m; l++) {
          can[(k-1)*m + l] = (a[k][l] >= mi ? 1 : 0);
        }
      }
      bool vis[n*m + 1];
      int dist[n*m + 1];
      for(int k=1; k<=n*m; k++) vis[k] = 0, dist[k] = 1e18;
      dist[(i-1)*m + j] = 1;
      queue<int> q;
      q.push((i-1)*m + j);
      while(q.size()) {
        int f=q.front(); q.pop();
        if(!vis[f]) {
          vis[f] = 1;
          vector<pair<int, int> > dirs = {{-1, 0}, {1, 0}, {0, -1}, {0, 1}};
          for(pair<int, int> x: dirs) {
            int old_r = (f-1) / m + 1, old_c = (f-1) % m + 1;
            old_r += x.first, old_c += x.second;
            if(min(old_r, old_c) >= 1 && old_r <= n && old_c <= m) {
              int id = (old_r-1) * m + old_c;
              if(!vis[id] && can[id] && dist[id] > dist[f] + 1) {
                dist[id] = dist[f] + 1;
                q.push(id);
              }
            }
          }
        }
      }
      for(int k=1; k<=n; k++) {
        for(int l=1; l<=m; l++) {
          if(can[(k-1)*m + l] && dist[(k-1)*m + l] != 1e18) {
            ans = max(ans, a[k][l] - mi - dist[(k-1)*m + l]);
          }
        }
      }
    }
  }
  cout << ans << "\n";
}

int32_t main(){
  ios::sync_with_stdio(0); cin.tie(0);
  int t = 1; //cin >> t;
  for(int i=1; i<=t; i++) solve(i);
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 340 KB Output is correct
2 Correct 5 ms 340 KB Output is correct
3 Correct 5 ms 340 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 164 ms 368 KB Output is correct
10 Correct 144 ms 372 KB Output is correct
11 Correct 131 ms 380 KB Output is correct
12 Correct 136 ms 340 KB Output is correct
13 Correct 133 ms 340 KB Output is correct
14 Correct 169 ms 340 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 5 ms 340 KB Output is correct
10 Correct 5 ms 340 KB Output is correct
11 Correct 5 ms 340 KB Output is correct
12 Correct 164 ms 368 KB Output is correct
13 Correct 144 ms 372 KB Output is correct
14 Correct 131 ms 380 KB Output is correct
15 Correct 136 ms 340 KB Output is correct
16 Correct 133 ms 340 KB Output is correct
17 Correct 169 ms 340 KB Output is correct
18 Execution timed out 1066 ms 26444 KB Time limit exceeded
19 Halted 0 ms 0 KB -