int main()
{
    int n = 0;
    scanf("%d",&n);
    int arr[50]={0};
    int i = 0;
    for(i = 0;i<n;i++)
    {
        scanf("%d ",&arr[i]);
    }
    int up = 0;
    int down = 0;
    for(i = 0;i<n-1;i++)
    {
        if(arr[i+1]>=arr[i])//升序
        {
            up++;//1 6 6 9 9 22 22 30
        }
        if(arr[i+1]<=arr[i])//降序
        {
            down++;
        }
    }
    if(up==(n-1)||down==(n-1))
    {
        printf("sorted");
    }
    else
    {
        printf("unsorted");
    }
    return 0;
}