solve(w01): 128. Longest Consecutive Sequence

Author: jeongwoo903

longest-consecutive-sequence/jeongwoo903.js

@@ -0,0 +1,25 @@
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+
+var longestConsecutive = function(nums) {
+    if (nums.length <= 1) return nums.length;
+
+    const sortedArray = [...new Set(nums)].sort((a,b) => a - b);
+
+    let maxLength = 1;
+    let currentLength = 1;
+
+    for (let i = 1; i < sortedArray.length; i++) {
+        if (sortedArray[i] === sortedArray[i-1] + 1) {
+            currentLength++;
+        } else {
+            currentLength = 1;
+        }
+
+        maxLength = Math.max(maxLength, currentLength);
+    }
+
+    return maxLength;
+};