#include<bits/stdc++.h>
using namespace std;
int main() {
	int n,ans=0,a;
	scanf("%d",&n);
	double x,y;
	for(int i=1;i<=n;i++){
		scanf("%lf %lf %d",&x,&y,&a);
		ans+=(int)ceil(1.5*a+sqrt(x*x+y*y)/25);
	}
    cout<<ans<<endl;
    return 0;
}