#!/usr/bin/env python

Q = int(input())
events = []
for i in range(Q):
    events.append([int(x) for x in input().split()])

i = 1
ans = 0
labo_indexs = {}
for event in events:
    if event[0] == 1:
        labo_indexs[i] = event[1]
        i += 1
        if event[1] <= ans:
            print(ans)
            continue
    elif event[0] == 2:
        tmp = labo_indexs[event[1]]
        del labo_indexs[event[1]]
        if tmp < ans:
            print(ans)
            continue
    elif event[0] == 3:
        labo_indexs = dict([(x, y+event[1]) for (x, y) in labo_indexs.items()])
        if ans != 0 and event[1] >= 0:
            ans += event[1]
            print(ans)
            continue

    vals = sorted(labo_indexs.values(), reverse=True)
    for l in range(len(vals), -1, -1):
        npeop = 0
        for val in vals:
            if val >= l:
                npeop += 1
            elif val < l:
                break
        if npeop >= l:
            ans = l
            print(ans)
            break
        else:
            continue