How to Find the Mode of Vector in C++?

// C++ Program to find mode of all Elements in a vector
#include <iostream>
#include <unordered_map>
#include <vector>
using namespace std;

// Function to find the mode of a vector
int findMode(const vector<int>& nums)
{
    // Create an unordered map to store frequency of each
    // element
    unordered_map<int, int> frequency;

    // Iterate through the vector and update frequency of
    // each element
    for (int num : nums) {
        frequency[num]++;
    }

    // Initialize variables to keep track of mode and its
    // frequency
    int mode = 0;
    int maxFrequency = 0;

    // Iterate through the unordered map and find the
    // element with maximum frequency
    for (const auto& pair : frequency) {
        if (pair.second > maxFrequency) {
            maxFrequency = pair.second;
            mode = pair.first;
        }
    }

    // Return the mode
    return mode;
}

// Driver Code
int main()
{
    // Create a vector of numbers
    vector<int> numbers
        = { 1, 2, 3, 4, 5, 2, 3, 2, 2, 4, 2 };

    // Find the mode of the vector
    int mode = findMode(numbers);

    // Print the mode
    cout << "Mode: " << mode << endl;

    return 0;
}