#include <bits/stdc++.h>

using namespace std;
int ct,v[200005];
set<int> S;
int main(){
    freopen("heapuri.in","r",stdin);
    freopen("heapuri.out","w",stdout);
    int n;
    scanf("%d",&n);
    for(int i=1;i<=n;++i){
        int tip;
        scanf("%d",&tip);
        if(tip==1){
            scanf("%d",&v[++ct]);
            S.insert(v[ct]);
        }
        else if(tip==2){
            int x;
            scanf("%d",&x);
            S.erase(v[x]);
        }
        else printf("%d\n",*S.begin());
    }
    return 0;
}