from sortedcontainers import SortedList
from collections import defaultdict

S = SortedList([])
N, Q = map(int, input().split())
dic1 = defaultdict(int)
dic2 = defaultdict(int)
ans = []
for _ in range(Q):
    t, *sr = input().split()
    if t == "1":
        s, r = sr
        r = int(r)
        dic1[s] = r
        dic2[s] = 1
        S.add((1, -r, s))
        tmp = []
        if N < len(S):
            a, b, s = S.pop(-1)
            ans.append(s)
    elif t == "2":
        x = int(sr[0])
        N = max(0, N - x)
        tmp = []
        while N < len(S):
            a, b, s = S.pop(-1)
            tmp.append((b, s))
        tmp.sort(reverse=True)
        for t, s in tmp:
            ans.append(s)
    else:
        s, x = sr
        x = int(x)
        N += x
        if dic2[s] == 1:
            S.remove((1, -dic1[s], s))
            S.add((0, -dic1[s], s))
        dic2[s] = 0

for s in ans:
    print(s)