def solve():
"""X = number of colors present
X = X1 + X2 + ... + X7, where
Xi = 1 if color i present else 0
EX = E(X1 + X2 + ... X6)
EX = EX1 + EX2 + ... + EX6
EX = 7 * EX1
EX = 7 * (1 * p(color present))
EX = 7 * (1 - p(color absent))
EX = 7 * (1 - #(colors absent) / #(possibilities))
EX = 7 * (1 - 60 choose 20 / 70 choose 20)
"""
return round(7 * (1 - choose(60, 20) / choose(70, 20)), 10)
def solve():
ncr = (choose(n, r) for n in range(1, 101) for r in range(n))
return sum(1 for n in ncr if n > 1000000)
