#include <iostream.h>
#include <math.h>
int main()
{
    long n,k,m;
    float r;
    while(cin>>n)
    {
        r=float(sqrt(1+8.0*n)-1)/2;
        if (fabs(r-int(r))<1e-5)
            k=int(r);
        else
            k=int(r)+1;
        m=n-k*(k-1)/2;
        if(k%2!=0)
            cout<<k+1-m<<'/'<<m<<endl;
        else
            cout<<m<<'/'<<k+1-m<<endl;
    }
    return 0;
}

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