Merge pull request neetcode-gh#1889 from saip7795/sp/power-x-n

 Create: 0050-power-x-n.rb

ruby/0050-power-x-n.rb

@@ -0,0 +1,23 @@
+
+def my_pow(x, n)
+ solution = multiply(x, n.abs)
+
+ if n>=0
+ return solution
+ else
+ return (1/solution)
+
+ end
+end
+
+
+def multiply(x,n)
+ return 0 if x==0
+ return 1 if n==0
+ result = multiply((x*x),n/2)
+ if (n%2 ==1)
+ return (x * result)
+ else
+ return result
+ end
+end