import random

wins=0
attempts=100000
for case in range(0, attempts):
    score=0
    for flip in range(0, 100):
        result=random.uniform(-1,1) #tails, heads
        if (result<0):
            result=-1
        else:
            result=1

        if (score<0): #"doubles" the coin's worth (adds result twice)
            score=score+result
        score=score+result
    if (score>0):
        wins+=1;
print(wins)