#include <iostream>
#include <iomanip>

using namespace std;

void rearrange(int a[], int n)
{
    if (n%2) n++;
    int k = 1, m = n/2;
    if (m%2) ++m;
    while(k < n/2)
    {
        int t = a[k];
        a[k] = a[m];
        a[m] = t;
        k+=2; m+=2;
    }
}


int main(int argc, char * argv[])
{
    int a[11];
    for(int i = 0; i < 11; ++i) a[i] = i;
    rearrange(a,11);
    for(auto i: a) cout << i << " ";
}