PrVecList5

#include <iostream>
#include <fstream>
#include <list>

using namespace std;

int main (void)
{
    ifstream in("input.txt");
    ofstream out("output.txt");

    int x, y;
    int a;
    list <int> ls;
    list <int>::iterator i;

    while (in >> a)
        ls.push_back(a);

    y = ls.back();
    ls.pop_back();
    x = ls.back();
    ls.pop_back();

    for (i = ls.begin(); i != ls.end();)
    {
        a = *i;
        if (a == x)
        {
            i++;
            ls.insert(i, y);
        }
        else
            i++;
    }

    for (i = ls.begin(); i != ls.end(); i++)
        out << *i << " ";

}