#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main() {
    int N;
    cin>>N;
    vector<int> A(N);
    for(int i=0;i<N;i++) cin>>A[i];
    int ans = 0;
    while(ans < N && A[ans] == A[0]) ans++;
    cout<<ans<<endl;
}