백준 7단계 no.3

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        int level = 1;
        int bound = 1;
        while (n > bound) {
            level += 1;
            bound += level;
        }

        int gap = bound - n;

        int k = 1;

        for (int i = 0; i < gap; i++) {
            k++;
            level--;
        }

        if (((level+gap)%2) == 1) {
            System.out.println(k + "/" + level);
        } else {
            System.out.println(level + "/" + k);
        }

    }
}