1374：铲雪车(snow)

 #include <iostream>

    
 #include <cmath>
    
 #include <cstdio>
    
 using namespace std;
    
 int main()
    
 {
    
 	double x1,y1,x2,y2,d=0,t;
    
 	cin>>x1>>y1;
    
 	while(cin>>x1>>y1>>x2>>y2){
    
 		d+=sqrt(1.0*(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
    
 	}
    
 	t=d*2/1000/20;
    
 	printf("%d:%02d",(int)t,(int)(t*60+0.5)%60);
    
 	return 0;
    
 }