#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
 
struct my_struct
{
    std::string first_name;
    std::string last_name;
};
 
int main()
{
  std::vector<my_struct> my_vector(5);
 
  my_vector[0].first_name = "David";
  my_vector[0].last_name = "Andriw";
 
  my_vector[1].first_name = "Jhon";
  my_vector[1].last_name = "Monta";
 
  my_vector[2].first_name = "Jams";
  my_vector[2].last_name = "Ruth";
 
  my_vector[3].first_name = "David";
  my_vector[3].last_name = "AAA";
 
  my_vector[4].first_name = "Jhon";
  my_vector[4].last_name = "BBB";
 
  for(int i = 0; i < my_vector.size(); i++)
  {
		int my_count = std::count_if(my_vector.begin(), my_vector.end(),
	    	[&](const my_struct& s) {
	        	return s.first_name == my_vector[i].first_name;
			});   
    	std::cout << "First_Name: " << my_vector[i].first_name << "\tCOUNT: " << my_count << std::endl;
  }
 return 0;
}

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