#include <bits/stdc++.h>
using namespace std;
int n,m;
double x,y,s,sum=0;
int main(){
    cin>>n; 
    for(int i=1;i<=n;i++){
        cin>>x>>y>>m;
        s=sqrt(x*x+y*y);
        sum+=s/25+m*1.5;
    }
    cout<<ceil(sum)<<endl;
    return 0;
}
//完美结束

#include<bits/stdc++.h>
using namespace std;
int n;
double x,y;
double z;
double s=0;
int main(){
	cin>>n;
	for(int i=0;i<n;i++){
		cin>>x>>y>>z;
		double ss=sqrt(x*x+y*y);
		s+=(ss/50)*2+z*1.5;
	}
	cout<<ceil(s)<<endl;
	return 0;
}