#include <bits/stdc++.h> using namespace std; int main(){ int n; scanf("%d", &n); double sum = 0; for (int i = 1; i <= n; i++){ double x, y;//注意是 double 类型 int p; scanf("%lf%lf%d", &x, &y, &p); double dis = sqrt(x * x + y * y); sum += dis / 50 + p + dis / 50 + p * 0.5; //船往返的时间总和 } printf("%d\n", int(ceil(sum)));//向上取整函数 return 0; }

#include <bits/stdc++.h> 
using namespace std; 
int main(){ 
	int n; 
	scanf("%d", &n); 
	double sum = 0; 
	for (int i = 1; i <= n; i++){ 
		double x, y;
		int p; 
		scanf("%lf%lf%d", &x, &y, &p); 
		double dis = sqrt(x * x + y * y); 
		sum += dis / 50 + p + dis / 50 + p * 0.5; 
	}
	printf("%d\n", int(ceil(sum)));
	return 0;
}

#include <bits/stdc++.h>

using namespace std;

int main(){

int n;

int p;

double x,y;

double t,tot;

scanf("%d",&n);

while(n--){

	scanf("%lf%lf%d",&x,&y,&p);

	t=sqrt(x\*x+y\*y);

	tot+=(t/50)\*2+1.5\*p;

}

printf("%d",(int)ceil(tot));

return 0;

}