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Leetcode Problem 1145. Binary Tree Coloring Game
1145. Binary Tree Coloring Game
AI Mock Interview
Leetcode Solutions
Counting Subtrees for Winning Strategy
Solution Idea
Algorithm Steps
Code Implementation
Complexity Analysis
Define a recursive function to count the nodes in a subtree.
Use this function to find the node
x
colored by the first player.
Count the nodes in the left and right subtrees of node
x
.
Calculate the remaining nodes in the tree excluding the subtrees of
x
.
Compare the sizes of the subtrees and the rest of the tree to determine if the second player can win.
If any of the subtrees or the rest of the tree has more than half of the total nodes, the second player can win by choosing a node from that part.
Return
true
if the second player can win, otherwise return
false
.
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