text: #include<bits/stdc++.h>
  #include <iostream>
  #include <string>
  #include <vector>
  #include<bits/stdc++.h>
  using namespace std;
  #define gc getchar_unlocked
  #define fastio                        \
      ios_base::sync_with_stdio(false); \
      cin.tie(NULL)
  #define endl "\n"
  #define ll long long
  #define PI 3.1415926535897932384626
  #define si(x) scanf("%d", &x)
  #define sl(x) scanf("%lld", &x)
  #define ss(s) scanf("%s", s)
  #define pi(x) printf("%d\n", x)
  #define pl(x) printf("%lld\n", x)
  #define ps(s) printf("%s\n", s)
  #define br printf("\n")
  #define fo(i, n) for(i=0;i<n;i++)
  #define deba(i, a, n) fo(i, n){cout << a[i] << " ";}
  #define deb(x) cout << #x << " = " << x << endl;
  #define deb2(x, y) cout << #x << " = " << x << ", " << #y << " = " << y << endl;
  #define pb push_back
  #define mp make_pair
  #define F first
  #define S second
  #define all(x) x.begin(), x.end()
  #define rall(x) x.rbegin(), x.rend()
  #define clr(x) memset(x, 0, sizeof(x))
  #define sortall(x) sort(all(x))
  #define tr(it, x) for(auto it = x.begin(); it != x.end(); it++)
  #define trr(it, x) for(auto it = x.rbegin(); it != x.rend(); it+)
  typedef pair<int, int> pii;
  typedef pair<ll, ll> pl;
  typedef vector<int> vi;
  typedef vector<ll> vl;
  typedef vector<pii> vpii;
  typedef vector<pl> vpl;
  typedef vector<vi> vvi;
  typedef vector<vl> vvl;
  
  const int mod = 1'000'000'007;
  const int N = 3e5;
  
  int main() {
      fastio;
      unordered_map<int,int>m;
      int n;
      cin>>n;
      vector<int>todos;
      for (int i = 0; i < n; i++)
      {
          int var;
          cin>>var;
          m[var]+=1;
          todos.push_back(var);
      }
      vector<int>ma;
      for(auto c:m){
          if(c.second==1){
              ma.push_back(c.first);
          }
      }
      sort(ma.begin(),ma.end());
      int res=0;
      for(int i=0;i<todos.size();i++){
          if(todos[i]==ma[ma.size()-1]){
              res=i;
              break;
          }
      }
      if(res!=0){
          cout<<res+1<<endl;
      }else{
          cout<<"none"<<endl;
      }
      
      return 0;
  }