# 
# 

# There is an edge with the cost between a node to node
# Please find the min-cost from the root to leaf and return the leaf node
# - [3, 5] => 8
# - [3, 7] => 10
# - [4, 6] => 10
# - [5, 2] => 7 (min-cost)
# - [5, 10] => 15

# class Edge:
# def __init__(self, node, cost=0):
# self.cost = cost
# self.node = node

# class Node:
# def __init__(self, edges):
# self.edges = edges

# def getMinCostLeafNode(root):