Submission #1231820

#	Time	Username	Problem	Language	Result	Execution time	Memory
1231820		antromancap	Bitaro the Brave (JOI19_ho_t1)	C++20	100 / 100	94 ms	9160 KiB

joi2019_ho_t1

#include <bits/stdc++.h>

using namespace std;

const int N = 3003;
int n, m, c[N];
char a[N][N];

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

	cin >> n >> m;
	for (int i = 1; i <= n; i++)
		for (int j = 1; j <= m; j++) cin >> a[i][j];

	long long ans = 0;
	for (int i = n; i; i--) {
		int cur = 0;
		for (int j = m; j; j--) {
			c[j] += a[i][j] == 'I';
			cur += a[i][j] == 'O';
			if (a[i][j] == 'J') ans += c[j] * cur;
		}
	}
	cout << ans;
}

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