Commit ac260dd

mo <mokha@cisco.com>
2017-06-16 03:21:30
complete sum in range.
master
1 parent 77a9d8d
Changed files (1)
spec
sum_in_range_spec.rb
spec/sum_in_range_spec.rb
@@ -40,10 +40,11 @@ describe "sum_in_range" do
   MODULO = (10 ** 9) + 7
 
   def sum_in_range(numbers, queries)
-    [[3 + -2], [-2 + 2], [3, 2]]
-    [[1], [0], [5]]
-    [6]
-    0
+    sum = 0
+    queries.each do |(x, y)|
+      sum += numbers[x..y].inject(0, &:+)
+    end
+    sum % MODULO
   end
 
   [