Submission #1239419

#	Time	Username	Problem	Language	Result	Execution time	Memory
1239419		woe	Infinite Race (EGOI24_infiniterace2)	Pypy 3	100 / 100	217 ms	65368 KiB

Main

n = int(input())
e = int(input())
lap = 0
ahead = set()
for _ in range(e):
    x = int(input())
    if x > 0:
        if x in ahead:
            lap += 1
            ahead.clear()
        ahead.add(x)
    else:
        ahead.discard(-x)
print(lap)

Compilation message (stdout)

Compiling 'Main.py'...

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  adding: __main__.pyc (deflated 26%)

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• Subtask 1: 29 / 29
• Subtask 2: 34 / 34
• Subtask 3: 22 / 22
• Subtask 4: 15 / 15