［AtCoder］ABC-394｜B - cat

設問ページ

• 🔗ABC-394 B - cat

提出結果

def getInt():
    return int(input())


def getStringRow(N):
    return [input() for _ in range(N)]


def main():
    N = getInt()
    S = getStringRow(N)

    print("".join(sorted(S, key=len)))


if __name__ == "__main__":
    main()