1 #include<iostream> 2 #include<cstdio> 3 #include<algorithm> 4 #include<cstring> 5 using namespace std; 6 int n,temp,x,a[100003]; 7 int main(){ 8    int T,tt=1; 9    scanf("%d",&T);10    while(T--){11         scanf("%d",&n);12         for(int i=1;i<=n;i++)13           scanf("%d",&a[i]);14           int i;15         for( i=1;i<n;i++){16             if(a[i+1]-a[i]!=1)17                 break;18         }19         if(i==n)printf("Case #%d: 1\n",tt++);20         else21             printf("Case #%d: %d\n",tt++,i+1);22    }23 }