Submission #995522

#	Time	Username	Problem	Language	Result	Execution time	Memory
995522		Luca1234	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	321 ms	88404 KiB

joi2019_ho_t1

#include <iostream>

using namespace std;

char mat[3003][3003];
int spo[3003][3003], spi[3003][3003];

int main()
{
    int n, m;
    cin>>n>>m;
    for(int i=1; i<=n; i++)
    {
        for(int j=1; j<=m; j++)
        {
            cin>>mat[i][j];
            spo[i][j]=spo[i][j-1]+(mat[i][j]=='O');
            spi[i][j]=spi[i-1][j]+(mat[i][j]=='I');
        }
    }
    long long cnt=0;
    for(int i=1; i<=n; i++)
    {
        for(int j=1; j<=m; j++)
        {
            if(mat[i][j]=='J')
            {
                cnt+=(spo[i][m]-spo[i][j])*(spi[n][j]-spi[i][j]);
            }
        }
    }
    cout<<cnt;

    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50