tj

#include<iostream>
using namespace std;
int main(){
int n,k,place=0;
cin>>n;
int a[n+1];
for(int i=1;i<=n;i++){
int b;
cin>>b;
a[i]=b;
}
cin>>k;
for(int i=1;i<=n;i++){
if(k==a[i]){
cout<<place+1;
break;
}else{
place++;
}
}
if(place>=n){
cout<<"-1";
}
return 0;
}