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#include<cstdlib>
#include<cstdio>
#include<iostream>
using namespace std;
int main()
{
    int n;
    cin>>n;
    for(int i=1;i<=n;i+=2)
        cout<<i<<" ";
    for(int i=n-n%2;i>=1;i-=2)
        cout<<i<<" ";
    return 0;
}
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