Submission #641921

#	Time	Username	Problem	Language	Result	Execution time	Memory
641921		HibaKhalil	Collecting Mushrooms (NOI18_collectmushrooms)	C++14	9 / 100	30 ms	3176 KiB

mushrooms

#include<bits/stdc++.h>

using namespace std;

int main (){
    int r,c,d,k;
    cin>>r>>c>>d>>k;
    char grid[r][c];
    for(int i=0;i<r;i++) 
    {
        for(int j=0;j<c;j++)
        {
            cin>>grid[i][j];
        }
    }
    int sprinkles[r][c];

    for (int i=0;i<r;i++)
    {
        for (int j=0;j<c;j++)
        {
            sprinkles[i][j]=0;
            if(i>0)sprinkles[i][j]+=sprinkles[i-1][j];
            if(j>0)sprinkles[i][j]+=sprinkles[i][j-1];
            if(i>0 && j>0) sprinkles[i][j]-=sprinkles[i-1][j-1];

            if(grid[i][j]=='S'){
                sprinkles[i][j]++;
            }
        }
    }

    int res = 0;

    for(int i=0;i<r;i++)
    {
        for(int j=0;j<c;j++)
        {
            if(grid[i][j]=='M'){
                int i1 , j1 , i2 , j2;
                if(i-d>0) i1=i-d;
                else i1=0;
                if(i+d<r) i2=i+d;
                else i2=r-1;
                if(j-d>0) j1=j-d;
                else j1=0;
                if(j+d<c) j2=j+d;
                else j2=c-1;
                if(sprinkles[i2][j2]-sprinkles[i1][j1]>=k) 
                    res++;
            }
        }
    }

    cout<<res<<endl;
    return 0;
}

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