govno

#include <fstream>
#include <string>

struct Yoba
{
    int value;
    Yoba *next;

    Yoba(int v = 0, Yoba *n = 0)
    {
        value = v;
        next = n;
    }
};

static Yoba *createYoba(int value, Yoba *previous = 0)
{
    Yoba *y = new Yoba(value);
    if (previous)
        previous.next = y;
    return y;
}

int main(int, char **)
{
    Yoba *first = new Yoba;
    Yoba *y = createYoba(1, first);
    for (int i = 2; i <= 5; ++i)
        createYoba(i, y);
    std::string s;
    y = first;
    while (y) {
        s += std::to_string(y.value);
        s += "\n";
        Yoba *previous = y;
        y = y.next;
        delete previous;
    }
    //Writing
    std::ofstream out("file.txt");
    out << s;
    out.close;
    s.clear();
    first = 0;
    y = 0;
    //Reading
    std::ifstream in("file.txt");
    in >> s;
    int i = 0;
    std::string ss;
    while (i < s.size()) {
        if ('\n' == s[i]) {
            y = createYoba(std::stoi(ss), y);
            if (!first)
                first = y;
            ss.clear();
        } else {
            ss += s[i];
    }
    }
    return 0;
}