C :

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

int main()
{
	double x1,y1,x2,y2,s=0,t;
	int m;
	scanf("%*d%*d");
	while(scanf("%lf%lf%lf%lf",&x1,&y1,&x2,&y2)!=EOF)
		s+=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
	t=s/20000*2;
	m=(t-(int)t)*60+0.5;
	if(m==60)
		printf("%02d:00\n",(int)t+1);
	else
		printf("%02d:%02d\n",(int)t,m);
	return 0;
}

C++ :

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

int main()
{
	double x1,y1,x2,y2,s=0,t;
	int m;
	scanf("%*d%*d");
	while(scanf("%lf%lf%lf%lf",&x1,&y1,&x2,&y2)!=EOF)
		s+=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
	t=s/20000*2;
	m=(t-(int)t)*60+0.5;
	if(m==60)
		printf("%02d:00\n",(int)t+1);
	else
		printf("%02d:%02d\n",(int)t,m);
	return 0;
}

Java :

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int x = in.nextInt();
		int y = in.nextInt();
		double sum = 0;
		while (in.hasNextInt()) {
			int x1 = in.nextInt();
			int y1 = in.nextInt();
			int x2 = in.nextInt();
			int y2 = in.nextInt();
			sum += Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2));
		}
		double time = sum * 2 / 20000;
		int hour = (int) sum * 2 / 20000;
		int minutes = (int) ((time - hour) * 60 + 0.5);
		String strHour = null, strMinutes = null;
		if (hour < 10)
			strHour = "0" + hour;
		else
			strHour = "" + hour;
		if (minutes < 10)
			strMinutes = "0" + minutes;
		else
			strMinutes = "" + minutes;
		System.out.printf(strHour + ":" + strMinutes);
	}
}