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One bridge, 4 people. A, B, C, D. A takes 2 mins to cross the bridge, B 4 mins, C 8 mins, D 16mins. It is dark and 1 torch. So, 2 people need to cross the bridge at the same time, so that one person can bring back the torch for the next group to cross the bridge. The 2 pepole group walks at the pace of the slower walker. How to cross the bridge in the fasted way?
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Senior Software Engineer

Interviewed at Roblox

3.8★
Aug 20, 2011

One bridge, 4 people. A, B, C, D. A takes 2 mins to cross the bridge, B 4 mins, C 8 mins, D 16mins. It is dark and 1 torch. So, 2 people need to cross the bridge at the same time, so that one person can bring back the torch for the next group to cross the bridge. The 2 pepole group walks at the pace of the slower walker. How to cross the bridge in the fasted way?

# a list of strings. Each string is a management / report relationship. # # EXAMPLE INPUT: # # [ # 'B,E,F', # 'A,B,C,D', # 'D,G,I', # 'G,H' # ] So, write some code (pseudo or language of your choice, including SQL) for the following: A is the manager of B, C, D. B is the manager of E and F, and so forth. # EXAMPLE OUTPUT: # # A # ....B # ........E # ........F # ....C # ....D # ........G # ............H # ........I
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Senior Software Engineer

Interviewed at Reddit

3.9★
May 22, 2019

# a list of strings. Each string is a management / report relationship. # # EXAMPLE INPUT: # # [ # 'B,E,F', # 'A,B,C,D', # 'D,G,I', # 'G,H' # ] So, write some code (pseudo or language of your choice, including SQL) for the following: A is the manager of B, C, D. B is the manager of E and F, and so forth. # EXAMPLE OUTPUT: # # A # ....B # ........E # ........F # ....C # ....D # ........G # ............H # ........I

Puzzle: There are 4 persons (A, B, C, and D) who want to cross a bridge in night. A takes 1 minute to cross the bridge. B takes 2 minutes to cross the bridge. C takes 5 minutes to cross the bridge. D takes 10 minutes to cross the bridge. There is only one torch with them and the bridge cannot be crossed without the torch. There cannot be more than two persons on the bridge at any time, and when two people cross the bridge together, they must move at the slower person. What is the minimum time required to cross the bridge
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Android Developer

Interviewed at OneBanc Technologies Pvt. Ltd

4.9★
May 28, 2024

Puzzle: There are 4 persons (A, B, C, and D) who want to cross a bridge in night. A takes 1 minute to cross the bridge. B takes 2 minutes to cross the bridge. C takes 5 minutes to cross the bridge. D takes 10 minutes to cross the bridge. There is only one torch with them and the bridge cannot be crossed without the torch. There cannot be more than two persons on the bridge at any time, and when two people cross the bridge together, they must move at the slower person. What is the minimum time required to cross the bridge

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