Submission #1286787

#	Time	Username	Problem	Language	Result	Execution time	Memory
1286787		arashmemar	Bitaro the Brave (JOI19_ho_t1)	C++20	100 / 100	117 ms	82332 KiB

joi2019_ho_t1

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

const int maxn = 3e3 + 100;

char t[maxn][maxn];
int I[maxn][maxn], O[maxn][maxn];

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);

	int n, m;
	cin >> n >> m;
	for (int i = 1;i <= n;i++)
	{
		for (int j = 1;j <= m;j++)
		{
			cin >> t[i][j];
		}
	}

	for (int i = n;i;i--)
	{
		for (int j = 1;j <= m;j++)
		{
			I[i][j] = I[i + 1][j] + (t[i][j] == 'I');
		}
	}

	for (int i = 1;i <= n;i++)
	{
		for (int j = m;j;j--)
		{
			O[i][j] = O[i][j + 1] + (t[i][j] == 'O');
		}
	}

	long long int ans = 0;

	for (int i = 1;i <= n;i++)
	{
		for (int j = 1;j <= m;j++)
		{
			ans += O[i][j] * I[i][j] * (t[i][j] == 'J');
		}
	}
	cout << ans;
}

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