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There is a company, modelled as a tree of employees and the people reporting to them. Every employee has a fun value. At a party, every employee only has fun if his direct boss is not at the party, otherwise he adds fun corresponding to his fun value to the party. Write code to find the maximum total fun that can be had at the party.
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Software Engineer

Interviewed at Jane Street

4.4★
Nov 22, 2012

There is a company, modelled as a tree of employees and the people reporting to them. Every employee has a fun value. At a party, every employee only has fun if his direct boss is not at the party, otherwise he adds fun corresponding to his fun value to the party. Write code to find the maximum total fun that can be had at the party.

If V is a vector with n items and subroutine Exchange swaps its arguments, then the following code fragment sorts V in descending order. for( j = 0; j < n - 1; j++ ) for( k = 0; k < n - j - 1; k++ ) if( V[k] < V[k+1] ) Exchange( V[k], V[k+1] ); How many calls to Exchange are made if initially, V[i]=i, for i = 0, 1, 2, ..., n - 1 ? a. n-1 b. n c. n(n-1)/2 d. (n-1)(n-2) e. n(n-1)
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Software Engineer

Interviewed at Everpure

3.5★
Apr 30, 2011

If V is a vector with n items and subroutine Exchange swaps its arguments, then the following code fragment sorts V in descending order. for( j = 0; j < n - 1; j++ ) for( k = 0; k < n - j - 1; k++ ) if( V[k] < V[k+1] ) Exchange( V[k], V[k+1] ); How many calls to Exchange are made if initially, V[i]=i, for i = 0, 1, 2, ..., n - 1 ? a. n-1 b. n c. n(n-1)/2 d. (n-1)(n-2) e. n(n-1)

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