Submission #1099376

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099376		andreiqwer	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	134 ms	88404 KiB

joi2019_ho_t1

#include <iostream>

using namespace std;

int h, w;
long long cntfin;
int ocnts[3001][3001], icnts[3001][3001];
char s[3001][3001];
int main()
{
    cin.tie(0);
    ios_base::sync_with_stdio(0);

    cin>>h>>w;
    for(int i=1; i<=h; i++)
    {
        for(int j=1; j<=w; j++)
        {
            cin>>s[i][j];

            ocnts[i][j]=ocnts[i][j-1]+(s[i][j]=='O');
            icnts[i][j]=icnts[i-1][j]+(s[i][j]=='I');
        }

    }

    for(int i=1; i<=h; i++)
    {
        for(int j=1; j<=w; j++)
        {
            if(s[i][j]=='J')
            {
                int ocnt, icnt;
                ocnt=ocnts[i][w]-ocnts[i][j-1];
                icnt=icnts[h][j]-icnts[i-1][j];

                cntfin+=ocnt*icnt;
            }
        }
    }

    cout<<cntfin;
}

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