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migy8d3u1epe39's blog

Uber coding round problem
By migy8d3u1epe39, history, 3 years ago, In English

The problem was in a long story format but let me simplify it for you :-)

Problem: Some genie has power P. He wants to grant n wishes of the form {xi, yi}. Now to grant i-th wish he needs to have at least power xi and after granting this wish his power becomes P-yi. In this process, his power shouldn't dip below zero. What is the maximum no. of possible wishes he can grant using his power?

Constraints: 1<=n<=100, 1<=P<=30000, 1<=x<=30000, -300<=y<=300

I couldn't solve this problem in test time, I've seen so many problems of this type but I always fail. I would be grateful if someone explains this. Thanks have a good day!

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3 years ago, # |
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https://codeforces.me/contest/1203/problem/F2, the exact question, you can refer to the editorial, if its of any help.

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    3 years ago, # ^ |
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    cool, I will look at the problem editorial seems interesting to me.

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3 years ago, # |
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Deleted.

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3 years ago, # |
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this is just the classical 0-1 knapsack problem but with different statement.

you can learn about it here: wikipedia and geeksforgeeks

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    3 years ago, # ^ |
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    I guess in knapsack problem the weight is constant but in this case it changes with each pick up, here yi could increase or decrease the power.

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      2 years ago, # ^ |
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      then why don't you take all the positions that have negative y_i and then do knapsack

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