#include <stdio.h>
# include <math.h>

int main()
{
	double x,y,a,b;
	int r,n,c=0,c1=0;
	scanf("%d",&n);
	
	int time,time1=0;
	while(c<n){
		scanf("%lf %lf %d",&x,&y,&r);
		c++;
		double t=0;
		b=x*x+y*y;
		a=sqrt(b);
		t+=(a/25)+(r*1.5);
		time=ceil(t);
		time1+=time;
	}

    printf("%d\n",time1);

	return 0;
}