Submission #494327

#	Time	Username	Problem	Language	Result	Execution time	Memory
494327		ahmeteren	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	333 ms	88516 KiB

joi2019_ho_t1

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

const int N = 3e3 + 5;

int satir[N][N], sutun[N][N];
char grid[N][N];

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

	// #ifndef ONLINE_JUDGE
	// 	freopen("in.txt", "r", stdin);
	// 	freopen("out.txt", "w", stdout);
	// #endif

	int n, m;
	cin >> n >> m;

	for(int i = 0; i < n; i++)
	{
		for(int j = 0; j < m; j++)
		{
			cin >> grid[i][j];
		}
	}

	for(int j = m - 1; j >= 0; j--)
	{
		for(int i = n - 1; i >= 0; i--)
		{
			sutun[i][j] = sutun[i + 1][j];
			if(grid[i][j] == 'I')
				sutun[i][j]++;
		}
	}

	for(int i = n - 1; i >= 0; i--)
	{
		for(int j = m - 1; j >= 0; j--)
		{
			satir[i][j] = satir[i][j + 1];
			if(grid[i][j] == 'O')
				satir[i][j]++;
		}
	}

	long long cevap = 0;

	for(int i = 0; i < n; i++)
	{
		for(int j = 0; j < m; j++)
		{
			if(grid[i][j] == 'J')
			{
				cevap += satir[i][j] * sutun[i][j];
			}
		}
	}

	cout << cevap << '\n';
	return 0;
}

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