This is a puzzle question .... The warden meets with 23 new prisoners when they arrive. He tells them, "You may meet today and plan a strategy. But after today, you will be in isolated cells and will have no communication with one another. "In the prison is a switch room, which contains two light switches labeled A and B, each of which can be in either the 'on' or the 'off' position. I am not telling you their present positions. The switches are not connected to anything. "After today, from time to time whenever I feel so inclined, I will select one prisoner at random and escort him to the switch room. This prisoner will select one of the two switches and reverse its position. He must move one, but only one of the switches. He can't move both but he can't move none either. Then he'll be led back to his cell. "No one else will enter the switch room until I lead the next prisoner there, and he'll be instructed to do the same thing. I'm going to choose prisoners at random. I may choose the same guy three times in a row, or I may jump around and come back. "But, given enough time, everyone will eventually visit the switch room as many times as everyone else. At any time anyone of you may declare to me, 'We have all visited the switch room.' and be 100% sure. "If it is true, then you will all be set free. If it is false, and somebody has not yet visited the switch room, you will be fed to the alligators." What is the strategy they come up with so that they can be free?
6 15484two MIT math grads bump into each other at Fairway on the upper west side. they haven't seen each other in over 20 years. the first grad says to the second: "how have you been?" second: "great! i got married and i have three daughters now" first: "really? how old are they?" second: "well, the product of their ages is 72, and the sum of their ages is the same as the number on that building over there.." first: "right, ok.. oh wait.. hmm, i still don't know" second: "oh sorry, the oldest one just started to play the piano" first: "wonderful! my oldest is the same age!" problem: how old are the daughters?
2 6842What is the maximum amount of memory any single process on Windows can address? Is this different than the maximum virtual memory for the system? How would this affect a system design?
2 10625Describe the difference between Interface-oriented, Object-oriented and Aspect-oriented programming
1 12061When you?re running a component within ASP.NET, what process is it running within on Windows XP? Windows 2000? Windows 2003?
2 7587Post New Programming Languages AllOther Questions
In loading programs into memory, what is the difference between load-time dynamic linking and run-time dynamic linking?
kindly send interview materials
how to convert infix expression to prefix expression?
they asked me about srs (software requirement specifcation)? how can i get anydocumentation about srs & other documnts infomation like bdd, in testing? its urgent?
will it allow to add same value in HashMap class.
What is BASIS
what is the basic and unique feature of dotnet
how to study PHP my own? i reffered many sites.. but as being a fresher i couldnt follow those... which site will be the best one?
what will we require to build project with the help of oracle
Is class is a abstract datatype in java?
sample and simple coding where we get?
what do u mean by tagging
Find out the list of roles which gives access to GUI activities? thanks in advance
details description on this mantis? who is founder of this mantis?
what is delegate and how works delegate and event.