View Code of Problem 56

#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[]) {
	int h1,h2,m1,m2,s1,s2;
	scanf("%d:%d:%d",&h1,&m1,&s1);
	scanf("%d:%d:%d",&h2,&m2,&s2);
	int n1,n2;
	n1=h1*3600+m1*60+s1;
	n2=h2*3600+m2*60+s2;
	int n=abs(n1-n2);
	printf("%d:%02d:%02d",n/3600,n%3600/60,n%60);
	return 0;
}