#include
using namespace std;
int main() {
int n,m;cin>>n;int ar[100];
for(int i=0;i<n;i++){
cin>>ar[i];
}
cin>>m;int i;
for(i=0;i<n;i++){
if(m==ar[i]){
cout<<i;
}
if(i==n){
cout<<-1;
}
}
return 0;
}
while compilering ans is correct but only test case 0 fail