#include <fstream>
#include <functional>
#include <bitset>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>

using namespace std;

class parser {
public:
    inline parser() {
        /// default c-tor
    }

    inline parser(const char* file_name) {
        int fd = open(file_name, O_RDONLY);
        index &= 0;
        fstat(fd, &sb);
        buffer = (char*)mmap(0, sb.st_size, PROT_READ, MAP_PRIVATE | MAP_NORESERVE, fd, 0);
        close(fd);
    }

    template <typename T>
    inline parser& operator >> (T& n) {
        n &= 0;
#ifdef SIGNED
        sign &= 0;
        sign = (buffer[index - 1] == '-');
#endif
        for (; buffer[index] < '0' or buffer[index] > '9'; ++index);
        for (; '0' <= buffer[index] and buffer[index] <= '9'; ++index)
            n = (n << 3) + (n << 1) + buffer[index] - '0';
#ifdef SIGNED
        n ^= ((n ^ -n) & -sign);
#endif
        return *this;
    }

    ~parser() {
        munmap(buffer, sb.st_size);
    }

private:
    struct stat sb;
    int index;
#ifdef SIGNED
    int sign;
#endif
    char* buffer;
};

class writer {
public:
    writer() {};

    writer(const char* file_name) {
        output_file.open(file_name, std::ios::out | std::ios::binary);
        output_file.sync_with_stdio(false);
        index &= 0;
    }

    template <typename T>
    inline writer& operator <<(T target) {
        auto inc = [&, this]() mutable {
            if (++index == SIZE)
                index &= 0,
                output_file.write(buffer, SIZE);
        };

        aux &= 0;
#ifdef SIGNED_WRITE
        sign = 1;
        if (target < 0)
            sign = -1;
#endif  // SIGNED_WRITE
        if (target == 0) {
            buffer[index] = '0';
            inc();
            return *this;
        }
        for (; target; target = target / 10)
#ifndef SIGNED_WRITE
            nr[aux++] = target % 10 + '0';
#else
            nr[aux++] = (sign * target) % 10 + '0';
        if (sign == -1)
            buffer[index] = '-', inc();
#endif  // SIGNED_WRITE
        for (; aux; inc())
            buffer[index] = nr[--aux];
        return *this;
    }

    inline writer& operator <<(const char* target) {
        auto inc = [&, this]() mutable {
            if (++index == SIZE)
                index &= 0,
                output_file.write(buffer, SIZE);
        };

        aux &= 0;
        while (target[aux])
            buffer[index] = target[aux++], inc();
        return *this;
    }

    inline void close() {
        delete this;
    }

    ~writer() {
        output_file.write(buffer, index);
        output_file.close();
    }

private:
    static const int SIZE = 0x400000; ///2MB
    int index, aux;
#ifdef SIGNED_WRITE
    int sign;
#endif  // SIGNED_WRITE
    char buffer[SIZE], nr[24];
    std::fstream output_file;
};

template <typename Tkey, typename Tinfo, typename comparator, typename infinitum>
class fibonacci_heap {
public:
    struct node {
        node() { }

        node(Tinfo _info, Tkey _key) : key(_key), info(_info) {
            after = nullptr;
            before = nullptr;
            rank = 0;
            state = false;
            child = nullptr;
            parent = nullptr;
        }

        Tkey key;
        Tinfo info;
        unsigned rank;
        bool state;
        node* child, * after, * before, * parent;
    };

    fibonacci_heap(size_t _size = 1024) {
        A = new node * [_size];
        _root = nullptr;
    }

    node* make_item(Tinfo info, Tkey v) {
        return new node(info, v);
    }

    bool empty() { return root() == nullptr; }

    void add(Tinfo _a, Tkey _b) {
        root() = meld(make_item(_a, _b), root());
    }

    void add(node* a) {
        root() = meld(a, root());
    }

    node* pop_node(node* x) {
        decrease_key(x, -1);
        return pop();
    }

    node* pop() {
        auto x = root()->child;
        unsigned max_rank = 0;
        root() = x;

        while (x != nullptr) {
            auto y = x;
            x = x->after;
            while (A[y->rank] != nullptr) {
                y = link(y, A[y->rank]);
                A[y->rank] = nullptr;
                y->rank = y->rank + 1;
            }
            A[y->rank] = y;
            if (y->rank > max_rank)
                max_rank = y->rank;
        }

        for (unsigned i = 0; i <= max_rank; ++i) {
            if (A[i] != nullptr) {
                if (x == nullptr)
                    x = A[i];
                else
                    x = link(x, A[i]);
                A[i] = nullptr;
            }
        }
        return x;
    }

    node* top() {
        return root();
    }

    node* decrease_key(node* x, Tkey v) {
        x->key = v;
        if (x == root())
            return root();
        root()->state = false;
        decrease_ranks(x);
        cut(x);
        return link(x, root());
    }

private:
    node* meld(node* g, node* h) {
        if (g == nullptr) return h;
        if (h == nullptr) return g;
        return link(g, h);
    }

    node* link(node* x, node* y) {
        if (!is_less(x->key, y->key)) {
            add_child(x, y);
            return y;
        }
        else {
            add_child(y, x);
            return x;
        }
    }

    void add_child(node* x, node* y) {
        if (x == root())
            root() = y;
        x->parent = y;
        node* z = y->child;
        x->before = nullptr;
        x->after = z;
        if (z != nullptr) {
            z->before = x;
        }
        y->child = x;
    }

    void cut(node* x) {
        node* y = x->parent;
        if (y->child == x) {
            y->child = x->after;
        }
        if (x->before != nullptr) {
            x->before->after = x->after;
        }
        if (x->after != nullptr) {
            x->after->before = x->before;
        }
    }

    void decrease_ranks(node* y) {
        do {
            y = y->parent;
            if (y->rank > 0) {
                y->rank--;
            }
            y->state = !y->state;
        } while (y->state == false);
    }

    node*& root() { return _root; }

    node* _root, **A;

    comparator is_less;
    infinitum INF;
};

class infinit {
    int operator ()() {
        return -1;
    }
};

parser f("heapuri.in");
writer t("heapuri.out");
int n;
bitset <200010> vaz;
fibonacci_heap<int, int, std::less<int>, infinit> h(200010);

int main() {
    f >> n;

    for (int query, idx = 0, i = 0; i < n; ++i) {
        f >> query;

        switch (query) {
        case 1: {
            f >> query;
            ++idx;
            h.add(idx, query);
            break;
        }
        case 2: {
            f >> query;
            vaz[query] = true;
            break;
        }
        case 3: {
            while (vaz[h.top()->info]) {
                h.pop();
            }
            t << h.top()->key << "\n";
            break;
        }
        }
    }

    return 0;
}