diff --git a/src/index.js b/src/index.js
index 2f25fb2..859f234 100644
--- a/src/index.js
+++ b/src/index.js
@@ -8,8 +8,35 @@
  */
 
 const combinationSumRecursive = (
-    
-  }
+      candidates,
+      remainingSum,
+      finalCombinations = [],
+      currentCombination = [],
+      startFrom = 0
+    ) => {
+          if (remainingSum === 0) {
+            finalCombinations.push(currentCombination.slice());
+            currentCombination = [];
+            return finalCombinations;
+          }  
+          else {
+            if (remainingSum < 0)
+              return [];
+            else {
+              for (let currentIndex = startFrom; currentIndex < candidates.length; currentIndex++) {
+                const currentNumber = candidates[currentIndex];          
+                combinationSumRecursive(
+                  candidates,
+                  remainingSum - currentNumber,
+                  finalCombinations,
+                  [...currentCombination, currentNumber],
+                  currentIndex
+                );
+              }
+              return finalCombinations;
+            }
+          }
+        }
   
   /**
    * Backtracking algorithm of finding all possible combination for specific sum.