contains-duplicate solution

Author: nayeongdev

contains-duplicate/nayeongdev.js

@@ -0,0 +1,14 @@
+/**
+ * @param {number[]} nums
+ * @return {boolean}
+ * O(nlog(n)) : 정렬 O(nlog(n)) + 탐색 O(n)
+ */
+var containsDuplicate = function (nums) {
+    const sortedNums = nums.toSorted((a, b) => a - b)
+    for (let i = 0; i < nums.length - 1; i++) {
+        if (sortedNums[i] === sortedNums[i + 1]) {
+            return true
+        }
+    }
+    return false
+};