import math
T = 100
p = 0.5

for k in range (0, T):
    sum = 0
    for i in range(0, k+1):
        sum += (math.factorial(T)/(math.factorial(i) * math.factorial(T - i))) * p**(i) * (1-p)**(T-i)
    if  sum >= 0.01:
        print(k)
        break