Constraint Satisfaction Problems : light switches












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Suppose you have n light bulbs, where each light bulb i=1,…,n is initially off. You also have m buttons which control the lights. For each button j=1,…,m, we know the subset
Tj ⊂ {1,…,n} of light bulbs that it controls. When button j is pressed, toggles the state of each light bulb in
Tj (if 3 ∈ Tj and light bulb 3 is off, then after the button is pressed, light bulb 3 will be on, and vice versa). Your goal is to turn on all the light bulbs by pressing a sequence of buttons.



a.Cast this problem as a CSP (explicitly state the variables, domains of each variable, and constraint functions on each variable).



b.Suppose that if there are ever three consecutive buttons which are all pressed, then all the lights burn out. For example, you can press buttons {1, 3, 4, 6} but not {1, 3, 4, 5} because {3,4,5} are consecutive. Add the smallest number of constraints to your CSP from above to make sure that you don't burn out all the lights.










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    Suppose you have n light bulbs, where each light bulb i=1,…,n is initially off. You also have m buttons which control the lights. For each button j=1,…,m, we know the subset
    Tj ⊂ {1,…,n} of light bulbs that it controls. When button j is pressed, toggles the state of each light bulb in
    Tj (if 3 ∈ Tj and light bulb 3 is off, then after the button is pressed, light bulb 3 will be on, and vice versa). Your goal is to turn on all the light bulbs by pressing a sequence of buttons.



    a.Cast this problem as a CSP (explicitly state the variables, domains of each variable, and constraint functions on each variable).



    b.Suppose that if there are ever three consecutive buttons which are all pressed, then all the lights burn out. For example, you can press buttons {1, 3, 4, 6} but not {1, 3, 4, 5} because {3,4,5} are consecutive. Add the smallest number of constraints to your CSP from above to make sure that you don't burn out all the lights.










    share|improve this question

























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      Suppose you have n light bulbs, where each light bulb i=1,…,n is initially off. You also have m buttons which control the lights. For each button j=1,…,m, we know the subset
      Tj ⊂ {1,…,n} of light bulbs that it controls. When button j is pressed, toggles the state of each light bulb in
      Tj (if 3 ∈ Tj and light bulb 3 is off, then after the button is pressed, light bulb 3 will be on, and vice versa). Your goal is to turn on all the light bulbs by pressing a sequence of buttons.



      a.Cast this problem as a CSP (explicitly state the variables, domains of each variable, and constraint functions on each variable).



      b.Suppose that if there are ever three consecutive buttons which are all pressed, then all the lights burn out. For example, you can press buttons {1, 3, 4, 6} but not {1, 3, 4, 5} because {3,4,5} are consecutive. Add the smallest number of constraints to your CSP from above to make sure that you don't burn out all the lights.










      share|improve this question














      Suppose you have n light bulbs, where each light bulb i=1,…,n is initially off. You also have m buttons which control the lights. For each button j=1,…,m, we know the subset
      Tj ⊂ {1,…,n} of light bulbs that it controls. When button j is pressed, toggles the state of each light bulb in
      Tj (if 3 ∈ Tj and light bulb 3 is off, then after the button is pressed, light bulb 3 will be on, and vice versa). Your goal is to turn on all the light bulbs by pressing a sequence of buttons.



      a.Cast this problem as a CSP (explicitly state the variables, domains of each variable, and constraint functions on each variable).



      b.Suppose that if there are ever three consecutive buttons which are all pressed, then all the lights burn out. For example, you can press buttons {1, 3, 4, 6} but not {1, 3, 4, 5} because {3,4,5} are consecutive. Add the smallest number of constraints to your CSP from above to make sure that you don't burn out all the lights.







      artificial-intelligence constraint-satisfaction






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      asked Jan 1 at 13:30









      AmirAmir

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