#include<stdio.h> #include<math.h> int main() { int s1,s2,f1,f2,m1,m2,t,t1,t2; scanf("%d:%d:%d",&s1,&f1,&m1); scanf("%d:%d:%d",&s2,&f2,&m2); t1=s1*3600+f1*60+m1; t2=s2*3600+f2*60+m2; t=t1-t2; s1=t/3600; f1=t%3600/60; m1=t%3600%60; printf("%d:%02d:%02d",s1,f1,m1); return 0; } |
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