"""   Populate each next pointer to point to its next right node. If there is no
   next right node, the next pointer should be set to NULL. Initially, all next
   pointers are set to NULL.
"""

class Solution117:
    pass

"""   Populate each next pointer to point to its next right node. If there is no
   next right node, the next pointer should be set to NULL. Initially, all next
   pointers are set to NULL.
"""

class Solution117:
    pass

Populate each next pointer to point to its next right node. If there is no    next right node, the next pointer should be set to NULL. Initially, all next    pointers are set to NULL.