#include<iostream> #include<cmath> using namespace std; int main() { int n; cin>>n; double s=0; for(int i=0;i<n;i++) { double a,b; int c; scanf("%lf%lf%d",&a,&b,&c); s=s+sqrt(a*a+b*b)/50*2+c*1.5; } if(s!=int(s)) { s=int(s)+1; } printf("%d",int(s)); }