View Code of Problem 56

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

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