diff options
Diffstat (limited to '15.lua')
-rw-r--r-- | 15.lua | 13 |
1 files changed, 13 insertions, 0 deletions
@@ -0,0 +1,13 @@ +function combinations(n, r) + local numerator = 1 + local denominator = 1 + for i = n, n - r + 1, -1 do + numerator = numerator * i + end + for i = r, 1, -1 do + denominator = denominator * i + end + return numerator / denominator +end + +print(combinations(40, 20)) |