#!/usr/bin/env python3
# vim: set ts=4 sw=4 et tw=80:

import sys

def contains_two_equal(A):
    i = 0
    while i < len(A) - 1:
        j = i + 1
        while j < len(A):
            if A[i] == A[j]:
                return True
            j = j + 1
        i = i + 1
    return False

if __name__ == "__main__":
    A = [int(x) for x in sys.argv[1:]]
    print(contains_two_equal(A))