#include <iostream>
#include <stdio.h>
#include <conio.h>
#include <cstdlib>
using namespace std;

void print_bits (unsigned n)
{
    int bit;
    for (bit = sizeof(n)*8-1; bit >= 0; bit--)

    {
        if ((n >> bit) & 01)
        {
            putchar ('1');
        }
        else
        {
            putchar ('0');
        }

        if (bit % 4 == 0) putchar (' ');
    }
    cout<<endl;
}
unsigned replace_bits (unsigned x, unsigned p, unsigned n)
{
    unsigned mnoj=0, z;
    int bit;
    for (bit = sizeof(n)*8-1; bit >= 0; bit--)
    {
        if (bit>=p && bit<p+n)
        {
            z=((~(x>>bit) & 01));
            mnoj=(mnoj<<1) | z;
        }
        else
        {
            z=(((x>>bit) & 01));
            mnoj=(mnoj<<1) | z;
        }
    }
    cout<<endl;
    return mnoj;
}
main ()
{
    unsigned num;
    cout << "Input X" << endl;
    cin >> num;
    print_bits (num);
    int n,p;
    do
    {
        cout << " Enter P [numeracia s nula]: " ;
        cin >> p;
        if (p<0) {cout<<" -> ERROR : P must be >=0"<<endl;}

    } while (p<0);

    do
    {
        cout << " Enter N : " ;
        cin >> n;
        if (n<=0) {cout<<" -> ERROR : N must be >=1"<<endl;}

    } while (n<=0);



    unsigned result = replace_bits (num,p,n);
    print_bits (result);
    system ("PAUSE");
    return 0;
}