제출 #1150819

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1150819		pinbu	Bitaro the Brave (JOI19_ho_t1)	C++20	20 / 100	6 ms	7752 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;

const int N = 3003;
const long long oo = 1e18;

int n, m; char c[N][N];
int pO[N][N], pI[N][N];
void solve(void) {
	cin >> n >> m;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			cin >> c[i][j];
			pO[i][j] = pO[i][j - 1] + (c[i][j] == 'O');
			pI[i][j] = pI[i - 1][j] + (c[i][j] == 'I');
		}
	}
	int ans = 0;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++) {
			ans += (c[i][j] == 'J') * (pO[i][m] - pO[i][j]) * (pI[n][j] - pI[i][j]);
		}
	}
	cout << ans;
}

signed main(void) {
    ios::sync_with_stdio(false); cin.tie(nullptr);
    
    int t = 1;// cin >> t; 
    while (t--) solve();
    
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50