#include<bits/stdc++.h>
using namespace std;
int main()
{
long n,r,k;
while(scanf("%ld",&n)==1)
{
k=sqrt(2*n)+.5;
r=k*(k+1)/2-n;
printf("%ld/%ld\n",r+1,k-r);
}
return 0;
}
using namespace std;
int main()
{
long n,r,k;
while(scanf("%ld",&n)==1)
{
k=sqrt(2*n)+.5;
r=k*(k+1)/2-n;
printf("%ld/%ld\n",r+1,k-r);
}
return 0;
}
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