#
# µû¶óÇÏ¸ç ¹è¿ì´Â ÆÄÀ̽ã°ú µ¥ÀÌÅÍ°úÇÐ(»ý´ÉÃâÆÇ»ç 2020)
# 4.8 if-else ¹® ¾È¿¡ if-else ¹® ³Ö±â, 108ÂÊ
#
num = int(input("Á¤¼ö¸¦ ÀÔ·ÂÇϽÿÀ: "))
if num >= 0: # ¹Ýµå½Ã µé¿©¾²±â¸¦ ÇÏ¿© ºí·°À» »ý¼º
if num == 0: # ºí·° ³»¿¡¼ ¼¼ºÎÀûÀÎ Á¶°ÇÀ» ÇÑ ¹ø ´õ °Ë»ç
print("0ÀÔ´Ï´Ù.")
else:
print("¾ç¼öÀÔ´Ï´Ù.")
else:
print("À½¼öÀÔ´Ï´Ù.")