"""
There are 2 parts to this exercise. 
Part 1, refer to google classroom under the classwork tab
Part 2: Fix the game. Make it first to 3 wins
Challenge: People have habits when they play. Make the computer adjust to the user's habit fairly.

"""

def RPS():
    import random
    comp_answer = random.choice(["R","P","S"])
    valid_input = 0
    print("please enter R, P or S")
    user_choice = input()
    while(valid_input != 1):
        if(user_choice != "R" and user_choice != "P" and user_choice != "S"):
            print("invalid input")
            print("please enter R, P or S")
            user_choice = input()
        else:
            print("ok")
            valid_input = 1