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from heapq import heappush, heappop
h= []
p = set()
data = [input().split(' ') for _ in range(int(input()))]
for idx in range(len(data)):
records = data[idx]
if records[0] == '1':
# p.add(records[1],heappush(h, records[1]))
p.add(int(records[1]))
heappush(h, int(records[1]))
elif records[0] == '2':
p.discard(int(records[1]))
elif records[0] == '3':
while h[0] not in p:
heappop(h)
print(h[0])
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from heapq import heappush, heappop h= [] p = set()
data = [input().split(' ') for _ in range(int(input()))] for idx in range(len(data)): records = data[idx] if records[0] == '1': # p.add(records[1],heappush(h, records[1])) p.add(int(records[1])) heappush(h, int(records[1])) elif records[0] == '2': p.discard(int(records[1])) elif records[0] == '3': while h[0] not in p: heappop(h) print(h[0])