2025 07 19

# n,k=map(int,input().split())

# def f(n,k):

# if k==0:

# return n

# f(n*n,k-1)

# print(f(n,k))

# import sys

# sys.setrecursionlimit(1000000)

# n=int(input())

# def f(n):

# if n==0:

# return n

# return f(n-1)+n

# print(f(n))

# n,k=map(int,input().split())

# def f(n,k):

# if n==-1:

# if k%2==0:

# return 1

# elif k%2==1:

# return -1

# if n==1 :

# return 1

# if k==0:

# return 1

# if k==1:

# return n

# return f(n,k-1)*n

# print(f(n,k))

# N=int(input())

# r=0

# def f(N):

# global r

# if N==0:

# return r

# r=10*r+N%\

# 10

# return f(N//10)

# print(f(N))