diff options
Diffstat (limited to 'challenge-126/stuart-little/lua/ch-1.lua')
| -rwxr-xr-x | challenge-126/stuart-little/lua/ch-1.lua | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/challenge-126/stuart-little/lua/ch-1.lua b/challenge-126/stuart-little/lua/ch-1.lua new file mode 100755 index 0000000000..031196b56e --- /dev/null +++ b/challenge-126/stuart-little/lua/ch-1.lua @@ -0,0 +1,11 @@ +#!/usr/bin/env lua + +-- run <script> <number> + +function no1(nr) + if (nr:len() == 0) then return 0 end + if (nr:sub(1,1) == '1') then return 9^(nr:len()-1) end + return (tonumber(nr:sub(0,1))-1) * 9^(nr:len()-1) + no1(nr:sub(2)) +end + +print((not arg[1]:find('1')) and math.floor(no1(arg[1])) or math.floor(no1(arg[1])-1)) |