Create 3005. Count Elements With Maximum Frequency (#424)

Author: Chayandas07

3005. Count Elements With Maximum Frequency

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+class Solution {
+public:
+    // time/space: O(n)/O(n)
+    int maxFrequencyElements(vector<int>& nums) {
+        // count the frequency for each integer
+        unordered_map<int, int> freq;
+        for (auto& num : nums) freq[num]++;
+
+        // find the maximum frequency
+        int maxFreq = 0;
+        for (auto& [num, f] : freq) maxFreq = max(maxFreq, f);
+        
+        // calculate the sum of the frequencies with `maxFreq`
+        int result = 0;
+        for (auto& [num, f] : freq) {
+            if (f == maxFreq) result += f;
+        }
+        return result;
+    }
+};