救援（总时间）

解题思路:

注意事项:

参考代码:

#include<stdio.h>

#include<math.h>

int main()

{

int n,x,y,num;

double distance;

double time=0.0;

scanf("%d", &n);

while (n--)

{

scanf("%d %d %d", &x, &y, &num);

distance = sqrt(pow(x, 2) + pow(y, 2));

time += 2 * (distance/50);

time += num * 1.5;

}

if (time - (int)time != 0)

time = (int)time + 1;

printf("%.0lf\n", time);

return 0;

}