#include<fstream>

using namespace std;
ifstream fin("dateo.in");
ofstream fout("dateo.out");

int main()
{
    int x,i,n,a[100],s,d,m,gasit=0;
    fin>>n;
    for(i=1;i<=n;i++) fin>>a[i];
    fin>>x;
    s=1; d=n;
    while(s<=d && !gasit)
    {
       m=(s+d)/2;
       if(a[m]==x) gasit=1;
       else if(a[m]<x) s=m+1;
            else d=m-1;
    }
    if(gasit) fout<<m;
    else fout<<"Nu se gaseste";
    fin.close();
    fout.close();      
    return 0;
}