View Code of Problem 56

# include<stdio.h>
# include<math.h>
int main(void)
{
  int h1,h2,h3,m1,m2,m3,s1,s2,s3,t1,t2,t;
  scanf("%d:%d:%d",&h1,&m1,&s1);
  scanf("%d:%d:%d",&h2,&m2,&s2);
  t1 = h1*3600+m1*60+s1;
  t2 = h2*3600+m2*60+s2;
  t = abs(t2-t1);
  h3 = t/3600;
  m3 = t%3600/60;
  s3 = t%3600%60;
  printf("%d:%02d:%02d",h3,m3,s3);
  return 0;
}