Time: 3 ms (86.20%), Space: 7.9 MB (95.70%) - LeetHub

Author: hitesh19426

1207-unique-number-of-occurrences/1207-unique-number-of-occurrences.cpp

@@ -0,0 +1,18 @@
+class Solution {
+public:
+    bool uniqueOccurrences(vector<int>& arr) {
+        int count[2005] = {}, unique = 0;
+        for(int x: arr){
+            if(count[x+1000]++ == 0)
+                unique++;
+        }
+        
+        unordered_set<int> umap;
+        for(int i=0; i<=2002; i++){
+            if(count[i])
+                umap.insert(count[i]);
+        }
+        
+        return umap.size() == unique;
+    }
+};