Submission #321373

#	Time	Username	Problem	Language	Result	Execution time	Memory
321373		techiehere08	Collecting Mushrooms (NOI18_collectmushrooms)	C++14	18 / 100	36 ms	6636 KiB

mushrooms

#include <bits/stdc++.h>

using namespace std;

int main(){
  int n, m, k, d;
  scanf("%d%d%d%d", &n, &m, &k, &d);
  int dp[n + 2][m + 2];
  char grid[n + 2][m + 2];
  memset(dp, 0, sizeof dp);
 for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= m; j++) {
        cin >> grid[i][j];
        if (grid[i][j] != 'S') continue;

        dp[max(1, i - d)][max(1, j - d)]++;
        dp[min(n, i + d) + 1][max(1, j - d)]--;

        dp[max(1, i - d)][min(m, j + d) + 1]--;
        dp[min(n, i + d) + 1][min(m, j + d) + 1]++;
    }
}

for (int i = 1; i <= n; i++)
    for (int j = 1; j <= m; j++)
        dp[i][j] += dp[i - 1][j];

int ans = 0;

for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= m; j++) {
        dp[i][j] += dp[i][j - 1];
        ans += (grid[i][j] == 'M' && dp[i][j] >= k);
    }
}
  printf("%d", ans);
  return 0;
}
      
      
      

Compilation message (stderr)

mushrooms.cpp: In function 'int main()':
mushrooms.cpp:7:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    7 |   scanf("%d%d%d%d", &n, &m, &k, &d);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 10
• Subtask 3: 18 / 18
• Subtask 4: 0 / 23
• Subtask 5: 0 / 19
• Subtask 6: 0 / 21