added All Characters Equal Number Occurrence probl

Author: mukul96

Hashing/Check if All Characters Have Equal Number of Occurrences.cpp

@@ -0,0 +1,18 @@
+class Solution {
+public:
+    bool areOccurrencesEqual(string s) {
+        unordered_map<char, int> mp;
+        int count = 0;
+        for(int i=0;i<s.length();i++){
+            mp[s[i]]+=1;
+            count = mp[s[i]];
+        }
+        
+        for(auto it = mp.begin();it!=mp.end();++it){
+            if(count!=(it->second)){
+                return false;
+            }
+        }
+        return true;
+    }
+};