#include<bits/stdc++.h>
using namespace std;
int main(){
   
    long long l=1,r,mid,n,a;
    cin>>n;
    r=n;
    while(l<r){
   
        mid=(l+r)/2;
        if(mid*(mid+1)/2<n)l=mid+1;
        else r=mid;
    }
    a=n-l*(l-1)/2;
    if(l%2==0)
        cout<<a<<'/'<<l+1-a;
    else 
        cout<<l+1-a<<'/'<<a;
    return 0;
}

#include <bits/stdc++.h>
using namespace std; 
int main() {
   
	int n,k=1;
	cin>>n;
	while (n>k) {
   //找规律
		n=n-k;
		k++;
	}
	if(k%2==0) cout<<n<<"/"<<(k+1-n);
	else cout<<k+1-n<<"/"<<n;
	return 0;
}