#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() using namespace std; int main(){ /* int n,i,m,b; cin>>n; int a[n]; for(i=0;i<n;i++){ cin>>a[i]; if(a[i]>100){ b=i; } } cin>>m; a[b]=m; for(i=0;i<n;i++){ cout<<a[i]<<" "; } */ /* int n,c=0,b=100,i; double sum=0; cin>>n; int a[n]; for(i=0;i<n;i++){ cin>>a[i]; sum+=a[i]; if(a[i]>c){ c=a[i]; } if(a[i]<b){ b=a[i]; } } cout<<sum<<" "; printf("%.2lf",sum/n); cout<<" "<<c<<" "<<b; */ /* int n,i,b=0; double sum=0,m; cin>>n; int a[n]; for(i=0;i<n;i++){ cin>>a[i]; sum+=a[i]; } m=sum/n; for(i=0;i<n;i++){ if(a[i]>m){ b+=1; } } cout<<b; */ /* int n,i,b; cin>>n; int a[n+2]; for(i=1;i<=n;i++){ cin>>a[i]; } cin>>b; a[0]=b; for(i=0;i<=n;i++){ cout<<a[i]<<" "; } */ /* int n,i,x,b; cin>>n; int a[n+1]; for(i=1;i<=n;i++){ cin>>a[i]; } cin>>x; b=a[n]; for(i=n-1;i>=x;i--){ a[i+1]=a[i]; } a[x]=b; for(i=1;i<=n;i++){ cout<<a[i]<<" "; } */ /* int n,i,x,b; cin>>n; int a[n+1]; for(i=1;i<=n;i++){ cin>>a[i]; } cin>>x; for(i=x+1;i<=n;i++){ a[i-1]=a[i]; } for(i=1;i<n;i++){ cout<<a[i]<<" "; } */ /* int n,i,k,sum=0; cin>>n; int a[n]; for(i=0;i<n;i++){ cin>>a[i]; } cin>>k; for(i=0;i<n;i++){ if(a[i]==k){ sum+=1; } } cout<<sum; */ int n,i,k,sum=0; cin>>n; int a[n+1],f=n; for(i=1;i<=n;i++){ cin>>a[i]; } cin>>k; for(i=1;i<=n;i++){ if(a[i]==k){ if(i<f){ f=i; } if(i>sum){ sum=i; } } } if(sum>0){ cout<<f<<" "<<sum; }else{ cout<<-1; } return 0; }