51Nod-1615-跳跃的杰克

#include <stdio.h>

int n;

int main()
{
    while (~scanf("%d", &n))
    {
        if (n < 0)
        {
            n = -n;
        }

        int now = 0, len = 1;
        int ans = 0;
        while (now < n || (now - n) % 2)
        {
            ans++;
            now += len;
            len++;
        }

        printf("%d\n", ans);
    }

    return 0;
}