#include <iostream>
#include <fstream>

using namespace std;
ifstream f("cautbin.in");
ofstream fut("cautbin.out");
int v[100005],dr,st,mid,n,m,x,k,cx;
int main()
{
    f>>n;
    for(int i = 1; i <= n; i++)
        f>>v[i];
    f>>x;
    dr=n;
    st=1;
    while(st<dr)
    {
        mid=(st+dr+1)/2;
        if(v[mid]>x)
            dr=mid-1;
            else
                st=mid;
    }
    if(v[dr]==x)
        k=dr;
        else
            k=-1;
    if(k>0)
        fut<<k<<'\n'<<k<<'\n';
    else
        {cx=x-1;
        st=1;
        dr=n;
        while(st<dr)
        {
            mid=(st+dr+1)/2;
            if(v[mid]>cx)
                dr=mid-1;
            else st=mid;
        }
        fut<<dr<<'\n';
        }
        if(k>0)
        {
            int ok=1;
            st=1;
            while(ok)
            {
                if(v[st]==x)
                    ok=0;
                else
                    st++;
            }
            if(ok==0)
                fut<<st;
        }
        else
           {
               x=x+1;
               int ok=1;
               st=1;
               while(ok)
               {
                   if(v[st]==x)
                    ok=0;
                   else
                    st++;
               }
               if(ok==0)
                fut<<dr<<'\n'<<st;
           }





    return 0;
}