1. Given a Binary Tree, print left view of it. 2. Left view of a Binary Tree is set of nodes visible when tree is viewed from left side.
Input Format
Input is managed for you.
Output Format
Output is managed for you.
Constraints
0 <= Number of Nodes <= 10^5 -1000 <= value of Node data <= 1000
Notice
Try First, Check Solution later
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Input
15 1 1 -1 1 1 -1 1 -1 -1 1 -1 -1 1 -1 -1
Output
1 1 1 1 1