#!/usr/bin/env python3
# @author 轩辕龙儿
# @date 2022/10/25
# @file NP6.py

def solution():
    s1 = "Hello World!"
    s2 = "Hello Nowcoder!"
    print(s1)
    print(s2)


if __name__ == "__main__":
    solution()
num = float(input())
print("%0.2f" % num)