input_challenge.py

# This challenge is only for Python 2.

# input()

# In Python 2, the expression input() is equivalent to eval(raw _input(prompt)).

# Code

# >>> input()  
# 1+2
# 3
# >>> company = 'HackerRank'
# >>> website = 'www.hackerrank.com'
# >>> input()
# 'The company name: '+company+' and website: '+website
# 'The company name: HackerRank and website: www.hackerrank.com'
# Task

# You are given a polynomial P of a single indeterminate (or variable), x. 
# You are also given the values of x and k. Your task is to verify if P(x) = k.

# Constraints 
# All coefficients of polynomial P are integers. 
# x and k are also integers.

# Input Format

# The first line contains the space separated values of x and k. 
# The second line contains the polynomial P.

# Output Format

# Print True if P(x) = k. Otherwise, print False.

# Sample Input

# 1 4
# x**3 + x**2 + x + 1
# Sample Output

# True
# Explanation
# P(1) = 1 ^ 3 + 1 ^ 2 + 1 + 1 = 4 = k

 
# Hence, the output is True.

# Problem's link: https://www.hackerrank.com/challenges/input #

x, k = map(int, raw_input().strip().split())
polynomial = raw_input().strip()

polynomial = polynomial.replace('x', str(x))
print eval(polynomial) == k