oj.uz

Submission #624787

# Submission time Handle Problem Language Result Execution time Memory
624787 2022-08-08T18:08:07 Z rm1729 Collecting Mushrooms (NOI18_collectmushrooms) C++17
100 / 100
 28 ms 21904 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long

void solve(){
    int R, C;
    cin  >>R>>C;
    int D, K;
    cin >>D >>K;
    vector <vector <int>> pref(R+1, vector <int> (C+1,0));
    vector <pair<int,int>> loc;
    for(int i=1; i<=R; i++){
        string a;
        cin >>a;
        for(int j=1; j<=C; j++){
            char x = a[j-1];
            pref[i][j]=pref[i][j-1]+pref[i-1][j]-pref[i-1][j-1];
            if(x=='M') loc.push_back(make_pair(i,j));
            if(x=='S'){
                pref[i][j]++;
            } 
        }
    }
    int ans = 0;
    for(auto x: loc){
        pair maxpos =make_pair(min(R,x.first+D), min(C,x.second+D));
        pair minpos =make_pair(max(1ll,x.first-D), max(1ll,x.second-D));
        int n = pref[maxpos.first][maxpos.second]-pref[minpos.first-1][maxpos.second]-pref[maxpos.first][minpos.second-1]+pref[minpos.first-1][minpos.second-1];
        if(K<=n) ans++;
    }
    cout <<ans<<endl;
}

signed main(){
    int t=1;
    while(t--){
        solve();
    }
    return 0;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 300 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 0 ms 304 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 1924 KB Output is correct
2 Correct 7 ms 2028 KB Output is correct
3 Correct 10 ms 2528 KB Output is correct
4 Correct 7 ms 2132 KB Output is correct
5 Correct 8 ms 2144 KB Output is correct

Subtask #5
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 16176 KB Output is correct
2 Correct 28 ms 21768 KB Output is correct
3 Correct 26 ms 21776 KB Output is correct
4 Correct 25 ms 16748 KB Output is correct
5 Correct 27 ms 21904 KB Output is correct

Subtask #6
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 0 ms 304 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 724 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 6 ms 1924 KB Output is correct
17 Correct 7 ms 2028 KB Output is correct
18 Correct 10 ms 2528 KB Output is correct
19 Correct 7 ms 2132 KB Output is correct
20 Correct 8 ms 2144 KB Output is correct
21 Correct 23 ms 16176 KB Output is correct
22 Correct 28 ms 21768 KB Output is correct
23 Correct 26 ms 21776 KB Output is correct
24 Correct 25 ms 16748 KB Output is correct
25 Correct 27 ms 21904 KB Output is correct
26 Correct 22 ms 7452 KB Output is correct
27 Correct 20 ms 8768 KB Output is correct
28 Correct 17 ms 6924 KB Output is correct
29 Correct 16 ms 6992 KB Output is correct
30 Correct 24 ms 9556 KB Output is correct