import java.util.Scanner;  
  
public class Main {  
    public static void main(String[] args) throws Exception {  
        Scanner sc = new Scanner(System.in);  
        int X = sc.nextInt();  
  
        // 대각선 찾기  
        // 총 개수를 구하기 1, 3, 6, 10 ... 계차수열  
        int start = 1;  
        int startTerm = 2;  
        int total = start;  
        while (total < X) {  
            total = total+startTerm;  
            startTerm++;  
        }  
  
        // 대각선에서 몇번째인지 찾기  
        int A = total - X + 1;  
        int B = startTerm - (total - X) - 1;  
  
        // 대각선의 방향  
        String result = (startTerm%2 == 0)? A+"/"+B : B+"/"+A;  
        System.out.println(result);  
    }  
}

import java.io.BufferedReader;  
import java.io.BufferedWriter;  
import java.io.InputStreamReader;  
import java.io.OutputStreamWriter;  
  
public class Main {  
    public static void main(String[] args) throws Exception {  
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));  
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));  
  
        int X = Integer.parseInt(br.readLine());  
        br.close();  
  
        // 대각선 찾기    
// 총 개수를 구하기 1, 3, 6, 10 ... 계차수열    
int start = 1;  
        int startTerm = 2;  
        int total = start;  
        while (total < X) {  
            total = total+startTerm;  
            startTerm++;  
        }  
  
        // 대각선에서 몇번째인지 찾기    
int A = total - X + 1;  
        int B = startTerm - (total - X) - 1;  
  
        // 대각선의 방향    
String result = (startTerm%2 == 0)? A+"/"+B : B+"/"+A;  
        bw.write(result);  
  
        bw.close();  
    }  
}