this is my program :


#include<iostream>
using namespace std;

int main()
{
    int n;
    cin>>n;
    int i;
    for(i=0;i<n/2;i++)
        cout<<i+1<<" "<<n-i<<" ";
    if(n%2!=0)
        cout<<((int)n/2)+1<<" ";
    cout<<endl;
    cout<<"1 ";
    for(i=3;i<n;i+=2)
        cout<<i<<" ";
    int p=n;
    if(p%2!=0)
    {    p-=1;
        cout<<n<<" "; }
    for(p=p;p>1;p-=2)
        cout<<p<<" ";
    return 0;
}

I think its right but I get WA on test 4 anybody knows whats wrong ?