using namespace std;

int main()

{

	int n;double t;
	cin >>n;
	for(int i=0;i<n;i++){
		int z;double t1,t2,t3,x,y;
		cin >>x>>y;
		t1=sqrt(x*x+y*y)*2/50;
		cin >>z;
		t2=3/2*z;
		t3=t1+t2;
		t+=t3;
	}
	cout <<ceil(t);
}```