#include<stdio.h> main() { int h1,h2,m1,m2,s1,s2,sum1,sum2,sum,h,m,s; scanf("%d:%d:%d",&h1,&m1,&s1); scanf("%d:%d:%d",&h2,&m2,&s2); sum1=h1*3600+m1*60+s1; sum2=h2*3600+m2*60+s2; if(sum1>sum2) sum=sum1-sum2; else sum=sum2-sum1; h=sum/3600; sum=sum%3600; m=sum/60; s=sum%60; printf("%d:%02d:%02d\n",h,m,s); return 0; } |
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