#include <cstdio>
#include <set>

using namespace std;

int n, tip, x, nh=0,v[200010];
multiset <int, less<int> > heap;
int main(){
    freopen("heapuri.in","r",stdin);
    freopen("heapuri.out","w",stdout);

    scanf("%d\n",&n);
    for (int i=1;i<=n;i++){
        scanf("%d", &tip);
        if (tip==3) printf("%d\n",*heap.begin()),scanf("\n");
        if (tip==1) {scanf("%d\n",&x);heap.insert(x);++nh;v[nh]=x;}
        if (tip==2) scanf("%d\n",&x),heap.erase(v[x]);

    }
    return 0;
}