Add a solution for two-sum

Author: dongzoolee

two-sum/dongzoolee.ts

@@ -0,0 +1,20 @@
+function twoSum(nums: number[], target: number): number[] {
+  const sz = nums.length;
+  let l = 0,
+    r = 1,
+    sm = nums[0] + nums[1];
+
+  while (l <= sz - 2 && r <= sz - 1) {
+    sm = nums[l] + nums[r];
+
+    if (sm === target) {
+      return [l, r];
+    }
+
+    if (l === r - 1) {
+      (r++, (l = 0));
+    } else {
+      l++;
+    }
+  }
+}