View Code of Problem 56

#include<stdio.h>
#include<math.h>
int main(){
    int h1,h2,m1,m2,s1,s2,sum;
    scanf("%d:%d:%d",&h1,&m1,&s1);
    scanf("%d:%d:%d",&h2,&m2,&s2);
    sum=abs(h1*3600+m1*60+s1-h2*3600-m2*60-s2);
    printf("%d:%02d:%02d\n",sum/3600,sum%3600/60,sum%3600%60);
    return 0;
}