#include<bits/stdc++.h> using namespace std; int main(){ /**int n,a[10000],k,count=0; cin>>n; for(int i=1;i<=n;i++){ cin>>a[i]; } cin>>k; for(int i =1;i<=n;i++){ if(k==a[i])count++; } cout<<count; **/ int n,a[2000],k,first = -1,last = -1; cin>>n; for(int i=1;i<=n;i++){ cin>>a[i]; } cin>>k; for(int i = 1;i<=n;i++){ if(a[i] == k){ first =i; break; } } for(int i=n;i >=1;i--){ if(k == a[i]){ last = i; break; } } if(first ==-1){ cout<<-1; }else{ cout<<first<<" "<<last; } return 0; }