I came across an equation, but I am not able to prove it. Can somebody help me proving this equation.
I came across an equation, but I am not able to prove it. Can somebody help me proving this equation.
Is it possible to calculate the following recurrences in $$$O(N*2^N)$$$.
1) $$$dp[mask] = min(dp[mask] , dp[m_1] + dp[m_2]);$$$
where $$$m_1|m_2 = mask$$$
2) $$$dp[mask] = min(dp[mask] , dp[m_1] + dp[m_2]);$$$
where $$$m_1 \oplus m_2 = mask$$$ and $$$m_1$$$ ,$$$m_2$$$ are subsets of mask.
Hello, Codeforces!
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Pragyan, in association with Spider, presents Decode It. A reverse coding and logical reasoning contest on Hackerrank will go live on 23rd February, from 5:00 PM to 7:00 PM. A 120-minute contest to test your logical reasoning and coding abilities.
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CASH PRIZES Distribution (Indian Participants):
Contest Date: Friday, 23rd February
Contest Timing: 17:00 to 19:00 IST
Registration Link:Link
Discord link: Link
Pragyan Website link: Link
Duration: 120 minutes
Only Indian college students and registered participants will be eligible for prizes. Please join the discord server for getting regular updates about the event.
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Solutions for all the questions will be posted shortly after the contest ends!
https://cses.fi/problemset/task/2174
i am clueless for this problem. please help me .
I have solved the easy verison of problem using O(N) dp.
I have spent a good amount of time thinking but could not find any solution.
It would be nice if i get any hints.. instead of actual solution...
I have given thoughts about matrix exponentiation, or any observation patterns ... nothing seems to workout.
https://codeforces.com/contest/1721/submission/218867337
In this submission, for 4th testcase i get TLE. But 4th testcase participant output is printed, Why is it so...
I will account for good observations and ideas while solving problems in codeforces/CodeChef/atcoder . The proofs of the below statements will not be mentioned here; It's advised to do such proofs on your own for exercise.
Now consider the real problem of Dijkstra, where I have varying edge weights. I can add dummy nodes at the intermediate of those edges to make all edge weights equal. Example: If $$$w_i$$$ is the weight of the edge between $$$u$$$ and $$$v$$$.
I dont know what to put here.... Pls help
Hello Codeforces!
We are glad to invite you to participate in a contest hosted by technical fest Pragyan, NIT Trichy, which will take place on Thursday, 23rd March, from 5:30 PM to 7.10PM IST.
Pragyan, in association with Spider, presents Code Venture. An competitive programming contest on Codechef which will go live on 23rd March from 5:30-7:10 pm. An 100 minute contest to test your problem solving and thinking abilities.
Think you have what it takes to reach the top? Test your programming skills in a beginner friendly contest.
The contest is unrated for everybody and common for all divisions.
CASH PRIZES Distribution (Indian Participants):
Contest Link: CDVN23
Contest Date: Thursday, 23rd March
Contest Timing: 17:30 to 19:10 IST
Registration Link:Link
Google form link: Link
Duration: 100 minutes
Only registered participants will be eligible for prizes.
We want to thank:
Problem Setters
Problem Testers
CodeChef for supporting the event, their invaluable help, and their excellent platform.
Editorials for all the questions will be posted shortly after the contest ends!