Submission #571200

#	Time	Username	Problem	Language	Result	Execution time	Memory
571200		Cookie	Collecting Mushrooms (NOI18_collectmushrooms)	C++14	100 / 100	13 ms	5696 KiB

mushrooms

#include <bits/stdc++.h>
using namespace std;
#define LIFESUCKS ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define ll long long
#define ld long double
#define ar array
 
#define vt vector
 
 
#define pb push_back
 
 //ifstream fin("TAITRONG.INP");
//ofstream fout("TAITRONG.OUT");
#define fi first
#define se second
#define db double
#define ldb long double
#define vt vector
using namespace std;


int main()
{
   LIFESUCKS;
  int n, m, d, c; cin >> n >> m >> d >> c;
  char a[n + 1][m + 1];
  int pref[n + 1][m + 1];
  memset(pref, 0, sizeof(pref));
  for(int i = 1; i <= n; i++){
      for(int j = 1; j <= m; j++){
          cin >> a[i][j];
          pref[i][j] = pref[i - 1][j] + pref[i][j - 1] - pref[i - 1][j - 1] + (a[i][j] == 'S');
      }
  }
  int res = 0;
  for(int i = 1; i <= n; i++){
      for(int j = 1; j <= m; j++){
          if(a[i][j] == 'M'){
          int cri = max(i - d, 1), crj = max(j - d, 1), lsi = min(i + d, n), lsj = min(j + d, m);
          int cr = pref[lsi][lsj] - pref[lsi][crj - 1] - pref[cri - 1][lsj] + pref[cri - 1][crj - 1];
          res += (cr >= c);
          }
      }
  }
  cout << res;
    return 0;
}

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