#include <iostream>

#include <vector>

#include <algorithm>

using namespace std;

​

int main() {

  vector<int> numbers = {1, 2, 7, 5, 3, 5, 9, 2, 5};

  int amount = count(numbers.begin(), numbers.end(), 5);

  cout << "The number 5 appears " << amount << " times";

  return 0;

}

​