# All Questions

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### Disjoint Set Constant Time Union Operation

I am following a LeetCode tutorial for Disjoint sets I have trouble understanding why the so called "Quick Find" method needs to take O(n) time. I have implemented an data structure that has ...
1 vote
12 views

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### How can I smooth thousands of faces in a 3D-mesh so as to end up with 6 faces of a die?

I have a 3D scan of an object with multiple faces, for example a standard 6 face die. The scan is a point cloud file of the die. I am able to convert the point cloud into a mesh and retrieve faces ...
75 views

### is duality principle in boolean algebra is true for every expression

Let say A = 1 and B = 1 and then A+B = 1 now by using duality(replacing or gate by and gate and 1 by 0) we can say that, A.B = 0 but this is not 0, because 1.1 = 1, so please anyone clear my ...
30 views

### Are there problems in $P$, long suspected to be $NPC$ (or $NPI$)?

One of the most compelling arguments people cite for believing $P \ne NP$ is that there are many problems of both theoretical and practical significance for which an efficient solution has eluded many ...
1 vote
21 views

### fastest algorithm for rectangular linear assignment problem

I want to optimally assign $m$ jobs equally to $n$ workers, where $m>n$. Assume $m = an$ for some integer $a$, so that each worker must get exactly $a$ jobs. (The rectangular linear assignment ...
99 views

### Can PDA accept only by final state without finish reading input?

I am defining, a string $w$ is accepted by a PDA whenever the PDA enter into a final state during the computation(at least on one branch of the computation) on the input $w$ (no matter whether the ...
22 views

45 views

### How this state set of DFA was retrieved from the given NFA

I have this NFA: 1,{2, 3} 2,empty 3,{4} 4,empty All the arrows in this NFA are epsilon-arrows. I understand that all possible states that can be reached from each ...
628 views

### Scheduling / Queuing jobs with multiple different workers

I have a stream of jobs (so I don't know upfront how many jobs). And I have N workers in the system. Now I want to schedule / queue a job to one worker (a worker can have multiple jobs in his queue). ...
18 views

### What will be the Computational Complexity in terms of order O of the operations shown in the following figure

Suppose I have L bits. First, I want to multiply the L bits with L orthogonal codes of length N, and then I want to add all the vectors. So, first, I have to do a scalar multiplication with a vector ...
1 vote