from collections import Counter
from random import random
def sim(p, wins_needed):
    wins, losses = 0, 0
    while True:
        if random()<p:
            wins+=1
        else:
            losses+=1
        if wins>=wins_needed or losses>=wins_needed:
            return wins,losses
print(Counter([sim(0.51,3) for _ in range(1000000)]))