tj

#include<iostream>
#include<cmath>
using namespace std;
double x[10000010],y[10000010],people[10000010];
int main(){
int n;
double time=0;
cin>>n;
for(int i=1;i<=n;i++){
cin>>x[i]>>y[i]>>people[i];
time+=sqrt(x[i]*x[i]+y[i]*y[i])*2/50+people[i]*1.5;
}
cout<<ceil(time);
return 0;
}