#include<bits/stdc++.h>```cpp

using namespace std;
int main ()
{
	int n,i,m=0;
	double s=0.0,c=0.0,a,b;
	cin>>i;
	while(i--)
	{
		cin>>a>>b>>n;
		c+=sqrt(a*a+b*b);
		m+=n;
	}
	s=ceil(m*1.5+c/25);
	cout<<s<<endl;
	return 0;
}