#include<bits/stdc++.h>
using namespace std;
int main(){
int f[101]={},n;
cin>>n;
for(int i=1;i<=n;i++)cin>>f[i];
for(int i=1;i<=n;i++){
if(i==1){
if(f[i]<f[i+1]||f[i]>f[i+1])cout<<i-1<<" ";
}
else if(i==n){
if(f[i]<f[i-1]||f[i]>f[i-1])cout<<i-1<<" ";
}
else if((f[i]<f[i-1]&&f[i]<f[i+1])||(f[i]>f[i-1]&&f[i]>f[i+1]))
cout<<i-1<<" ";
}
}