C++ :

#include<cstdio>
#include<cstring>
#define clr(x)memset(x,0,sizeof(x))
long long f[50000];
int main()
{
    long long n,i,j,v;
    while(scanf("%lld",&n)!=EOF)
    {
        if(n==0)
        break;
        v=n*(n+1)/2;
        if(v%2==1)
        {
            printf("0\n");
            continue;
        }
        clr(f);
        f[0]=1;
        v/=2;
        for(i=1;i<=n;i++)
            for(j=v;j>=i;j--)
                f[j]+=f[j-i];
        printf("%lld\n",f[v]/2);
    }
    return 0;
}