def octal_to_binary(octal):
    # Converting Octal to Decimal
    decimal = 0
    power = 0
    while octal != 0:
        decimal += (octal % 10) * pow(8, power)
        octal //= 10
        power += 1
    # Converting Decimal to Binary
    binary = 0
    digit_place = 1
    while decimal != 0:
        binary += (decimal % 2) * digit_place
        decimal //= 2
        digit_place *= 10
    return binary
octal_number = int(input("Enter octal number: "))
binary_number = octal_to_binary(octal_number)
print(f"The binary equivalent of {octal_number} is {binary_number}")