#include<iostream> using namespace std; int main(){ int n; cin>>n; int a[n]; for(int i=0;i<=n-1;i++){ cin>>a[i]; } int m; cin>>m; int index=-2; for(int i=0;i<=n-1;i++){ if(a[i]==m){ if(index==-2){ cout<<i+1<<" "; } index=i; } } cout<<index+1; return 0; }