39B - Company Income Growth - CodeForces Solution

#include<bits/stdc++.h>
using namespace std;
int s[105];
int main(){
   int n,c=1,x;
   cin>>n;
   for(int i=1;i<=n;i++){
   	cin>>x;
   	if(x==c) s[c++]=2000+i;
   }
   if(c==1) cout<<0;
   else{cout<<c-1<<endl;
   	for(int i=1;i<c;i++) cout<<s[i]<<" ";
   } 
   
   
}