Submission #1354909

#	Time	Username	Problem	Language	Result	Execution time	Memory
1354909		bananacookie	Collecting Mushrooms (NOI18_collectmushrooms)	C++17	18 / 100	15 ms	29620 KiB

mushrooms

#include <bits/stdc++.h>
using namespace std;
#define endl '\n'

using pii=pair<int,int>;
int n,m,D,K,cnt;

int main(){
    ios::sync_with_stdio(false); cin.tie(0);
    
    cin>>n>>m>>D>>K;
    vector<vector<char>> a(n+5,vector<char>(m+5));
    vector<vector<int>> water(n+5,vector<int>(m+5)),diff(n+5,vector<int>(m+5));
    vector<pii> S;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cin>>a[i][j];
            if(a[i][j]=='S'){
                S.push_back({i,j});
            }
        }
    }

    for(auto [i,j]:S){
        int c1=j-D,c2=j+D;
        for(int r=i-D;r<=i+D;r++){
            diff[r][c1]++; diff[r][c2+1]--;
        }
    }

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

            if(a[i][j]=='M' && diff[i][j]>=K) cnt++;
        }
    }

    cout<<cnt<<endl;
}

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