bug

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
int main()
{
    int IN;
    cout << "Enter new element\n\n";
    cin >> IN;
    vector<int> arr;
    arr.push_back(3);
    arr.push_back(5);
    vector<int>::iterator arrIter;
    int inkr = 0;
    for (arrIter = arr.begin(); arrIter < arr.end(); ++arrIter)
    {
        if (IN < *arrIter)
        {
            ++inkr;
        }
    }
    int inkr1;
    inkr1 = arr.size() - inkr;
    arr.insert(arr.begin() + inkr1, IN);
    cout << "All massive" << endl;
    for (arrIter = arr.begin(); arrIter < arr.end(); ++arrIter)
    {
        cout << *arrIter << endl;
    }
    return 0;
}