Lua论分析需求（学好英文）的重要性

题目是这样的：

Observe that its base and height are both equal to

, and the image is drawn using # symbols and spaces. The last line is not preceded by any spaces.

Write a program that prints a staircase of size .

Function Description

Complete the staircase function in the editor below. It should print a staircase as described above.

例子是这样的：

What fuck!这是右对齐么？？？耗尽我的脑细胞，分析每行#号前后需要空格与行数的对应关系。结果只要右对齐就可以了。

 function InitStr(n )
     str = {}-- body
     for i=,n do
         str[i] = {}
         for j=,n do
             str[i][j] = "#"
         end
     end
     return str
 end

 function staircase1(n)
         -- body

     arr = InitStr(n)
     for i=,n do
         integer,frac = math.modf((n-i)/)
         if(frac > )then
             leftSpaceCount = integer +
         else
             leftSpaceCount = integer
         end
         for j=,i do
             arr[i][leftSpaceCount+j] = "#"
         end
         print(table.concat(arr[i]))
     end
 end

 function staircase(n)
         -- body

     arr = InitStr(n)
     for i=,n do
         leftSpaceCount = n - i
         for j=,leftSpaceCount do
             arr[i][j] = " "
         end
         print(table.concat(arr[i]))
     end
 end
 staircase()