［AtCoder］ABC-192｜B - uNrEaDaBlE sTrInG

設問ページ

• 🔗ABC-192 B - uNrEaDaBlE sTrInG

提出結果

def getString():
    return input()


def main():
    s = getString()

    s0 = "".join([s[i] for i in range(len(s)) if (i + 1) % 2 == 0])
    s1 = "".join([s[i] for i in range(len(s)) if (i + 1) % 2 != 0])

    print('Yes' if s0 == s0.upper() and s1 == s1.lower() else 'No')


if __name__ == "__main__":
    main()