#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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