import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        while(scan.hasNext()){
            int x = scan.nextInt();
            int temp = x;
            if(x<0){
                  temp = -x;
            }
            if(temp==0){
                  System.out.println(0);
                  continue;
            }
            int cnt =0;
            int sum = 0;
            while(sum<temp){
                  cnt++;
                  sum = sum+cnt;
                  
            }
            while((sum-temp)%2!=0){
                cnt++;
                sum = sum+cnt;
            }
            System.out.println(cnt);
            
 
       }
    }
}