add: combination-sum

Author: HerrineKim

combination-sum/HerrineKim.js

@@ -0,0 +1,30 @@
+// 시간 복잡도 : O(n^2)
+// 공간 복잡도 : O(n)
+
+/**
+ * @param {number[]} candidates
+ * @param {number} target
+ * @return {number[][]}
+ */
+
+var combinationSum = function(candidates, target) {
+  const result = [];
+  
+  const backtrack = (remaining, combo, start) => {
+      if (remaining === 0) {
+          result.push([...combo]);
+          return;
+      }
+      
+      for (let i = start; i < candidates.length; i++) {
+          if (candidates[i] <= remaining) {
+              combo.push(candidates[i]);
+              backtrack(remaining - candidates[i], combo, i);
+              combo.pop();
+          }
+      }
+  };
+  
+  backtrack(target, [], 0);
+  return result;
+};