Given a tree, and the weights of all the nodes and an integer x, the task is to find a node i such that weight[i] + x gives the minimum setbits, If two or more nodes have the same count of set bits when added with x then find the one with the minimum value.
x = 15
Node 1: setbits(5 + 15) = 2
Node 2: setbits(10 + 15) = 3
Node 3: setbits(11 + 15) = 3
Node 4: setbits(8 + 15) = 4
Node 5: setbits(6 + 15) = 3
Approach: Perform dfs on the tree and keep track of the node whose sum with x has minimum set bits. If two or more nodes have equal count of set bits then choose the one with the minimum number.
Below is the implementation of the above approach:
- Find the node whose sum with X has maximum set bits
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- Find the node whose xor with x gives minimum value
- Find the node whose absolute difference with X gives minimum value
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- Find the node whose xor with x gives maximum value
- Find all even length binary sequences with same sum of first and second half bits
- Find n-th node of inorder traversal
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