View Code of Problem 56

#include<stdio.h>
#include<math.h>
int main()
{
    int h1,m1,s1,h2,m2,s2,h,m,s;
    int sum1,sum2,cha;
    scanf("%d:%d:%d",&h1,&m1,&s1);
    scanf("%d:%d:%d",&h2,&m2,&s2);
    sum1=3600*h1+60*m1+s1;
    sum2=3600*h2+60*m2+s2;
    cha=abs(sum1-sum2);
    h=cha/3600;
    m=(cha-h*3600)/60;
    s=cha%60;
    printf("%d:%.2d:%.2d",h,m,s);
    return 0;
}