제출 #520896

#제출 시각아이디문제언어결과실행 시간메모리
520896emon_2007Bitaro the Brave (JOI19_ho_t1)C++17
100 / 100
710 ms158832 KiB
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
ll h, w, cnt, a[3001][3001], b[3001][3001], k, l;
char c[3001][3001];

int main()
{
    cin >> h >> w;
    for(int i = 1; i <= h; i++)
    {
        for(int j = 1; j <= w; j++)
        {
            cin >> c[i][j];
        }
    }
    for(int j = w; j >= 1; j--)
    {
        for(int i = h; i >= 1; i--)
        {
            if(c[i][j] == 'I')
            {
                k++;
            }
            a[i][j] = k;
        }
        k = 0;
    }
    for(int i = h; i >= 1; i--)
    {
        for(int j = w; j >= 1; j--)
        {
            if(c[i][j] == 'O')
            {
                l++;
            }
            b[i][j] = l;
        }
        l = 0;
    }
    for(int i = 1; i <= h; i++)
    {
        for(int j = 1; j <= w; j++)
        {
            if(c[i][j] == 'J')
            {
                cnt += a[i][j] * b[i][j];
            }
        }
    }
    cout << cnt;
    return 0;
}
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