if (n < 0)
    {
        n = fnd;
        if (s[n + 1] >= '5')
            for (int i = n; i >= -1; i--)
            {
                if (i == -1)
                {
                    s = "1" + s;
                    n++;
                    break;
                }
                if (i == fnd)
                    continue;
                if (s[i] == '9')
                    s[i] = '0';
                else
                {
                    s[i] = ch(s[i]);
                    break;
                }
            }
        for (int i = n - 1, k = 0; i >= 0 && k != -p; i--, k++)
        {
            s[i] = '0';
        }
        s = form(s);
        ll fnd1 = 0;
        for (int i = 0; i < s.size(); i++)
            if (s[i] == '.')
            {
                fnd1 = i;
                break;
            }
        n -= fnd - fnd1;
        for (int i = 0; i < n; i++)
            cout << s[i];
        cout << endl;
        return 0;
    }