"""
339. Nested List Weight Sum

Given a nested list of integers, return the sum of all integers in the list weighted by their depth.

Each element is either an integer, or a list -- whose elements may also be integers or other lists.

Example 1:
Given the list [[1,1],2,[1,1]], return 10. (four 1's at depth 2, one 2 at depth 1)

Example 2:
Given the list [1,[4,[6]]], return 27. (one 1 at depth 1, one 4 at depth 2, and one 6 at depth 3; 1 + 4*2 + 6*3 = 27)
"""

# This implementaion is just taking list object as argument not list of NestedInteger.
def calcDepthSum(nestedList, depth):
    """
    :type nestedList: List[NestedInteger]
    :rtype: int
    """
    total = 0
    for i in nestedList:
        if isinstance(i, int):
            total += i * depth
        elif isinstance(i, list):
            total += calcDepthSum(i, depth + 1)
    return total


def depthSum(nestedList):
    """
    :type nestedList: List[NestedInteger]
    :rtype: int
    """
    total = 0
    for i in nestedList:
        if isinstance(i, int):
            total += i
        elif isinstance(i, list):
            total += calcDepthSum(i, 2)
    return total


ll = [[1, 1], 2, [1, 1]]
print(depthSum(ll))
