Hello CodeForces, I am curious about how people tackle such problems but cant find resources (at least with a very brief google search). I would appreciate it if someone provided me with some.
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Hello CodeForces, I am curious about how people tackle such problems but cant find resources (at least with a very brief google search). I would appreciate it if someone provided me with some.
La Paz is clearly no place to host IOI. (It has already been talked about but I wanted to reignite the discussion.) https://codeforces.me/blog/entry/128667 by E869120 explains the issue thoroughly.
This is the first time I see pdf editorials for a round that is not for ICPC or similar contest. I love the format and just wanted to support the setters by writing this blog.
Hello CodeForces, today I was solving the problem 1985H2 - Maximize the Largest Component (Hard Version) and implemented it with C++. It passes all the tests seperately but throws RE when I try to run multiple tests. I have been debugging for around half an hour but can't find the problem. I would appreciate any help. Here is my submission:268092158
PS: Local compiler also throws RE.
The submission is here: 265738238
I do not think that I use significant stack memory here, it is mostly heap memory. Also I have cloned to the mashup to test with 2GB memory limits and got exactly the same result.
The code is pretty clear in my opinion but I will be happy to clarify if asked.
Thanks for your interest.
Hello CodeForces, today I tried solving the problem from a recent contest: 1923E - Count Paths
My Solution:
Use centroid decomposition to count the paths, for a given centroid, we keep track of the nodes we see first with a certain color and count the paths accordingly. Because colors go from 1 to N, we can use array instead of map. So I figured the time complexity would be O(N lg N). But the solution TLE's.
If you see any problems with the code, please let me know as I can't see the problem. If you don't understand a part of the code, please ask and I will clarify.
Submission: 255437477
UPD: The runtime takes more than 30 seconds! So I guess the runtime is O(N^2) somehow.
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