lucky_num =20
input_num=6
guess_count=1
while input_num != lucky_num and guess_count <=3:
    print("guess count: %d"%guess_count)
    input_num= input("input the guess num:")
    if(input_num>lucky_num):
        print("the guess num is bigger...")
    elif(input_num<lucky_num):
        print("thr guess num is smaller...")
        guess_count =guess_count + 1
    else:
        print("Bingo!")
        break
else:
    print("too many reatrys....")

找一个幸运数