Submission #670295

#	Time	Username	Problem	Language	Result	Execution time	Memory
670295		dozer	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	305 ms	220888 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
#define fileio() freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
#define fastio() cin.tie(0), ios_base::sync_with_stdio(0)
#define pb push_back
#define pii pair<int, int>
#define st first
#define nd second
#define endl "\n"
#define sp " "
#define N 3005
#define int long long

int row[N][N], col[N][N], arr[N][N];


int32_t main()
{
	fastio();

	int h, w;
	cin>>h>>w;
	for (int i = 1; i <= h; i++)
	{
		for (int j = 1; j <= w; j++)
		{
			char tmp;
			cin>>tmp;
			col[i][j] = col[i][j - 1];
			row[i][j] = row[i - 1][j];
			if (tmp == 'J') arr[i][j] = 1;
			else if (tmp == 'O') arr[i][j] = 2, col[i][j]++;
			else arr[i][j] = 3, row[i][j]++; 
			//cout<<row[i][j]<<sp;
		}
		//cout<<endl;
	}
	int ans = 0;
	for (int i = 1; i <= h; i++)
	{
		for (int j = 1; j <= w; j++)
		{
			if (arr[i][j] == 1) ans += (row[h][j] - row[i][j]) * (col[i][w] - col[i][j]);
		}
	}
	cout<<ans<<endl;

	cerr<<"time taken : "<<(float)clock() / CLOCKS_PER_SEC<<" seconds\n";
}

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