# depth=int(input('수심: ')) // 10
# pressure = 1
# pressure += 0.3 * depth
# print('수압:',pressure)
#
# import operator
#
# x = operator.add(10, 20)
# print(x)
# list = [10, 20, 30]
# tu = (10, 20, 30)
#
# print(list, tu)
# n=int(input())
# def number(n):
# if n<=0 :
# return
# print(n)
# number(n-1)
# number(n)
# a,b=map(int,input().split())
#
# def odd(x, y):
# if x > y :
# return
#
# if x % 2 != 0:
# print(x,end=' ')
# odd(x+1, y)
#
# odd(a, b)
# n=int(input())
# def number(a):
# if a>n :
# return
# print(a)
# number(a+1)
# number(1)
# '''
# 1, 2, 3, 4, 5
# 5, 4, 3, 2, 1
#
# '''
# import sys
# limit_number = 15000
# sys.setrecursionlimit(limit_number) #파이썬
#
# n=int(input())
# s = 0
# def number(a):
# if a == 1:
# return 1
#
# return a + number(a - 1)
#
# s = number(n)
#
# print(s)
# n= int(input())
# m=1
# def factorial(x):
# if x == 1 :
# return 1
#
# return x * factorial(x - 1)
#
# m = factorial(n)
#
# print(m)
#피보나치-> 비대칭 / 재귀 2번
# N = int(input())
#
# def fibonacci(x):
# n =
# return fibonacci(x-2) + fibonacci(x-1)
#
# fibonacci(N)
#
# print(fibonacci(x))