oj.uz

Submission #317512

# Submission time Handle Problem Language Result Execution time Memory
317512 2020-10-30T00:41:29 Z casperwang Maxcomp (info1cup18_maxcomp) C++14
100 / 100
 142 ms 17400 KB 
#include <bits/stdc++.h>
using namespace std;

const int MAXN = 1000;
const int INF = 2e9;
int n, m;
int arr[MAXN+1][MAXN+1];
int pre[MAXN+1][MAXN+1];
int ans;

void rotate(int n, int m) {
  for (int i = 1; i <= max(n,m); i++)
    for (int j = i+1; j <= max(n,m); j++)
      swap(arr[i][j], arr[j][i]);
  for (int i = 1; i <= m; i++)
    for(int j = 1; j <= n/2; j++)
      swap(arr[i][j], arr[i][n-j+1]);
}

signed main() {
  ios_base::sync_with_stdio(0), cin.tie(0);
  cin >> n >> m;
  for (int i = 1; i <= n; i++)
    for (int j = 1; j <= m; j++)
      cin >> arr[i][j];
  for (int i = 0; i <= max(n,m); i++)
    pre[i][0] = INF;
  for (int i = 0; i <= max(n,m); i++)
    pre[0][i] = INF;
  for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= m; j++) {
      pre[i][j] = min({pre[i-1][j], pre[i][j-1], arr[i][j]-i-j});
      ans = max({ans, arr[i][j]-i-j - pre[i-1][j], arr[i][j]-i-j - pre[i][j-1]});
    }
  }
  rotate(n, m);
  for (int i = 1; i <= m; i++) {
    for (int j = 1; j <= n; j++) {
      pre[i][j] = min({pre[i-1][j], pre[i][j-1], arr[i][j]-i-j});
      ans = max({ans, arr[i][j]-i-j - pre[i-1][j], arr[i][j]-i-j - pre[i][j-1]});
    }
  }
  rotate(m, n);
  for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= m; j++) {
      pre[i][j] = min({pre[i-1][j], pre[i][j-1], arr[i][j]-i-j});
      ans = max({ans, arr[i][j]-i-j - pre[i-1][j], arr[i][j]-i-j - pre[i][j-1]});
    }
  }
  rotate(n, m);
  for (int i = 1; i <= m; i++) {
    for (int j = 1; j <= n; j++) {
      pre[i][j] = min({pre[i-1][j], pre[i][j-1], arr[i][j]-i-j});
      ans = max({ans, arr[i][j]-i-j - pre[i-1][j], arr[i][j]-i-j - pre[i][j-1]});
    }
  }
  cout << ans-1 << "\n";
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 8192 KB Output is correct
2 Correct 8 ms 8192 KB Output is correct
3 Correct 8 ms 8192 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 768 KB Output is correct
10 Correct 1 ms 768 KB Output is correct
11 Correct 1 ms 768 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 768 KB Output is correct
14 Correct 1 ms 768 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 8 ms 8192 KB Output is correct
10 Correct 8 ms 8192 KB Output is correct
11 Correct 8 ms 8192 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 768 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 1 ms 768 KB Output is correct
16 Correct 1 ms 768 KB Output is correct
17 Correct 1 ms 768 KB Output is correct
18 Correct 137 ms 9460 KB Output is correct
19 Correct 137 ms 16760 KB Output is correct
20 Correct 135 ms 16504 KB Output is correct
21 Correct 141 ms 16632 KB Output is correct
22 Correct 142 ms 16632 KB Output is correct
23 Correct 140 ms 16632 KB Output is correct
24 Correct 138 ms 17400 KB Output is correct