adding leetcode75

Author: ansh23coder

OtherJavaScriptQuestions/75_SortColors.js

@@ -0,0 +1,23 @@
+// https://leetcode.com/problems/sort-colors/description/
+
+
+/**
+ * @param {number[]} nums
+ * @return {void} Do not return anything, modify nums in-place instead.
+ */
+var sortColors = function(nums) {
+    const freq = [0, 0, 0];
+
+    for(const num of nums){
+        freq[num]++;
+    }
+
+    let index = 0;
+    
+    for(let i=0; i<3; i++){
+        for(let j=0; j<freq[i]; j++){
+            nums[index++] = i;
+        }
+    }
+};
+