combibation-sum

Author: jun0811

combination-sum/jun0811.js

@@ -0,0 +1,27 @@
+/**
+ * @param {number[]} candidates
+ * @param {number} target
+ * @return {number[][]}
+ */
+var combinationSum = function (candidates, target) {
+  const result = [];
+  candidates.sort((a, b) => a - b);
+  function backTracking(start, arr, total) {
+    if (total == target) {
+      result.push([...arr]);
+      return;
+    }
+
+    for (let i = start; i < candidates.length; i++) {
+      const cur = candidates[i];
+      if (cur + total > target) {
+        return;
+      }
+
+      backTracking(i, [...arr, cur], total + cur);
+    }
+  }
+
+  backTracking(0, [], 0);
+  return result;
+};