The Number Off of FFF

 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         else
21             printf("Case #%d: %d\n",tt++,i+1);
22    }
23 }