제출 #118864

#제출 시각아이디문제언어결과실행 시간메모리
118864tmwilliamlin168Bitaro the Brave (JOI19_ho_t1)C++14
100 / 100
82 ms18168 KiB
#include <bits/stdc++.h>
using namespace std;

#define ll long long

const int mxN=3e3;
int h, w, a[mxN];
string g[mxN];
ll ans;

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);

	cin >> h >> w;
	for(int i=0; i<h; ++i)
		cin >> g[i];
	for(int i=h-1; i>=0; --i) {
		for(int j=w-1, b=0; j>=0; --j) {
			if(g[i][j]=='J')
				ans+=a[j]*b;
			else if(g[i][j]=='O')
				++b;
			else
				++a[j];
		}
	}
	cout << ans;
}
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