Submission #162707

#	Time	Username	Problem	Language	Result	Execution time	Memory
162707		NachoLibre	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	547 ms	220792 KiB

joi2019_ho_t1

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

long long n, m, d[3003][3003][3], fp;
char a;

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;
			if(a == 'J') d[i][j][0] = 1;
			else if(a == 'O') d[i][j][1] = 1;
			else d[i][j][2] = 1;
		}
	}
	for(int i = n; i; --i) {
		for(int j = m; j; --j) {
			d[i][j][1] += d[i][j + 1][1];
			d[i][j][2] += d[i + 1][j][2];
		}
	}
	for(int i = 1; i <= n; ++i) {
		for(int j = 1; j <= m; ++j) {
			if(d[i][j][0]) {
				fp += d[i][j][1] * d[i][j][2];
			}
		}
	}
	cout << fp << endl;
	return 0;
}

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