［AtCoder］ABC-350｜B - Dentist Aoki

設問ページ

• 🔗ABC-350 B - Dentist Aoki

提出結果

import collections


def getIntMap():
    return map(int, input().split())


def getIntList():
    return list(map(int, input().split()))


def main():
    n, q = getIntMap()
    t = getIntList()

    ta = collections.Counter(t)
    for x in ta.values():
        if x % 2 == 1:
            n -= 1
    print(n)


if __name__ == "__main__":
    main()