Submission #44699

#	Time	Username	Problem	Language	Result	Execution time	Memory
44699		admin	Maxcomp (info1cup18_maxcomp)	C++17	15 / 100	3 ms	1196 KiB

maxcomp

#include <bits/stdc++.h>

using namespace std;

const int N_ = 1050, M_ = 1050;

int N, M, A[N_][M_];

int ans = -int(1e9);

void go() {
  vector< vector<int> > mn(N+1, vector<int>(M+1, int(1e9)+1));
  vector< vector<int> > mx(N+1, vector<int>(M+1, -1));
  for(int i = 1; i <= N; i++) {
    for(int j = 1; j <= M; j++) {
      int cur_min = min(mn[i][j-1], mn[i-1][j]);
      int cur_max = max(mx[i][j-1], mx[i-1][j]);
      ans = max(ans, max(A[i][j] - cur_min, -A[i][j] + cur_max) - (i + j) - 1);
      mn[i][j] = min(cur_min, A[i][j] - (i + j));
      mx[i][j] = max(cur_max, A[i][j] + (i + j));
    }
  }
}

int main() {
  ios::sync_with_stdio(false);
  cin >> N >> M;
  for(int i = 1; i <= N; i++) {
    for(int j = 1; j <= M; j++) {
      cin >> A[i][j];
    }
  }

  assert(1 <= N * M && N * M <= 20);
  go();
  for(int i = 1; i <= N; i++) {
    reverse(A[i]+1, A[i]+M+1);
  }
  go();

  cout << ans << endl;
  return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 0 / 15
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40