Submission #879215

#	Time	Username	Problem	Language	Result	Execution time	Memory
879215		mahmoudbadawy	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	166 ms	55888 KiB

joi2019_ho_t1

#include <bits/stdc++.h>

using namespace std;

const int N=3005;

int n,m;
string gr[N];
int co[N][N];

int main()
{
	cin >> n >> m;
	for(int i=0;i<n;i++) cin >> gr[i];
	for(int i=n-1;i>=0;i--)
	{
		for(int j=0;j<m;j++)
		{
			co[i][j]=(gr[i][j]=='I')+co[i+1][j];
		}
	}
	long long ans=0;
	for(int i=0;i<n;i++)
	{
		int cur=0;
		for(int j=m-1;j>=0;j--)
		{
			cur+=gr[i][j]=='O';
			if(gr[i][j]=='J')
			{
				ans+=1LL*cur*co[i][j];
			}
		}
	}
	printf("%lld\n", ans);
}

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