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- #include<stdio.h>
- int main()
- {
- int i,j,t,n,ch,cm,ah[1000],am[1000],at[1000],d,ans;
- while(scanf("%d",&t)==1)
- {
- for(j=1;j<=t;j++)
- {
- ans=2500;
- scanf("%d",&n);
- scanf("%d:%d",&ch,&cm);
- for(i=0;i<n;i++)
- {
- scanf("%d:%d %d",&ah[i],&am[i],&at[i]);
- d=ah[i]*60+am[i]-ch*60-cm+at[i];
- if(d<at[i])
- d=(ah[i]+24)*60+am[i]-ch*60-cm+at[i];
- if(d<ans)
- ans=d;
- }
- printf("Case %d: %d\n",j,ans);
- }
- }
- }
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