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In Today’s class, Chef is here to teach students about Trees. Tree is a a connected graph of N nodes and N-1 edges. After class, Chef gave them an assignment to complete. Assignment is as follows :- Given a tree with single node (root), we need to find whether we can build a tree with exactly N leaf nodes by applying given queries. Query 1 : Choose any i in between 2 to K and any leaf node say L in current Tree, attach i leaf nodes to L. (We can choose any particular i only once) Query 2 : Choose an existing edge of Tree and cut the edge. Remove the entire sub-tree attached with that edge. Students need to answer T independent test cases. Can you help them ? Example • If K = 5, N = 6. One possible way to build a tree with N = 6 leaf nodes is :- o Query 1:1 = 5, leaf node = root. Now, there are 6 nodes in tree and 5 leaf nodes. o Query 1 : 1 = 2, choose any of the 5 leaf nodes. Now, there are 8 nodes in tree an leaf nodes. • If K = 2, N = 3. It is not possible to build tree with 3 leaf nodes using given queries. Function Description •K: Represents the maximum value of i allowed in Query 1. •N: Represents the required number of leaf nodes.
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Associate Software Engineer Intern

Interviewed at Victoria's Secret

3.4★
Apr 28, 2022

In Today’s class, Chef is here to teach students about Trees. Tree is a a connected graph of N nodes and N-1 edges. After class, Chef gave them an assignment to complete. Assignment is as follows :- Given a tree with single node (root), we need to find whether we can build a tree with exactly N leaf nodes by applying given queries. Query 1 : Choose any i in between 2 to K and any leaf node say L in current Tree, attach i leaf nodes to L. (We can choose any particular i only once) Query 2 : Choose an existing edge of Tree and cut the edge. Remove the entire sub-tree attached with that edge. Students need to answer T independent test cases. Can you help them ? Example • If K = 5, N = 6. One possible way to build a tree with N = 6 leaf nodes is :- o Query 1:1 = 5, leaf node = root. Now, there are 6 nodes in tree and 5 leaf nodes. o Query 1 : 1 = 2, choose any of the 5 leaf nodes. Now, there are 8 nodes in tree an leaf nodes. • If K = 2, N = 3. It is not possible to build tree with 3 leaf nodes using given queries. Function Description •K: Represents the maximum value of i allowed in Query 1. •N: Represents the required number of leaf nodes.

But that’s not the only way analytics have shaped the process. Google used to conduct many interviews before settling on a job candidate and making an offer. But through analytics, the company has determined that after four interviews, they don’t achieve a much greater degree of confidence about whether the interviewee is a good fit for a position. As a result, they’ve capped the number of interviews that they’ll put a candidate through. Data also have led Google to conclude that speed is of the essence when it comes to hiring recent graduates.
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Software Engineer Intern

Interviewed at Google

4.4★
Oct 15, 2013

But that’s not the only way analytics have shaped the process. Google used to conduct many interviews before settling on a job candidate and making an offer. But through analytics, the company has determined that after four interviews, they don’t achieve a much greater degree of confidence about whether the interviewee is a good fit for a position. As a result, they’ve capped the number of interviews that they’ll put a candidate through. Data also have led Google to conclude that speed is of the essence when it comes to hiring recent graduates.

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