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#include <stdio.h>
int main(){
    int n;
    int a[100005];
    int i, j, k;
    int f = 0;
    scanf("%d",&n); 
    j = n;
    k = 1;
    int num = 1;
    for(i = 1; i <= n/2; i++){
        if(f == 0){
            a[k] = num;
            num++;
            k++;
            f = 1;
        }
        if(f == 1){
            a[j] = num;
            num++;
            j--;
            f = 0;
        }
    }
    if(n%2!=0){
        a[n/2+1]=n;
    }
    for(i = 1; i< n; i++){
        printf("%d ",a[i]);
    }  
    printf("%d",a[n]);                   
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