acm-icpc | : trophy : ACM International Collegiate Programming Contest | Learning library
kandi X-RAY | acm-icpc Summary
kandi X-RAY | acm-icpc Summary
A repository along with a wiki for the Brock ICPC team or students with interest in the ICPC. Post your solutions, libraries, guides, tutorials, or anything you think is helpful. IMPORTANT: I'm looking for someone (preferably at Brock) to adopt this project and maintain it. Please contact me if interested. This repo could use some cleaning and a lot more solved problems.
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Trending Discussions on acm-icpc
QUESTION
I am solving a problem on hackerrank Hacker Rank ICPC Team Problem
I have created the following code as solution for problem.
...ANSWER
Answered 2017-Jul-31 at 19:50Don't use string logic for this.
Parse the string into a BitSet, before entering your loops, i.e. as you read them.
Then use methods or(BitSet set), and cardinality().
I just completed challenge doing that. No timeouts.
QUESTION
First time, I coded like this (I was making a trie) and when I called add("911"); I got a segmentation fault at there when *str == '1'
...ANSWER
Answered 2019-Feb-27 at 14:16return chd[*str-'0']->add(++str);
contains undefined behavoir as you are modifying and using str unsequenced.
Your 'fix' has the classic behavoir of moving something around enough that the undefined behavoir is hidden. Remeber that Undefined Behavoir is undefined. It doens't have to crash. It doesn't even have to make sense. And most scarily it can do what you expect... for the time being at least.
A simple change is:
return chd[*str-'0']->add(str+1);
QUESTION
Im trying to use a Raleway font family for my heading in my website. In local testing it works fine but when pushed to git and run on git pages it doesnt work. I have even specified the text font TTF file in directory but still doesnt work. What am I doing wrong?
The website
https://codesniper99.github.io/Portfolio/
my html index file
...ANSWER
Answered 2019-Feb-21 at 07:09Hey root of the your local directory and your github page might be different can you try with relative path starting with ./
QUESTION
So, I have been doing research about solving the Game Strategy problem of ICPC 2014 (page 7).
This consist in a board game with n boxes, each box have a unique set of paths that goes to another box on the board (can have a path that goes to itself). I think a graph would be a good representation of the game, more specific a directed graph
graphic case representation whit n = 2
I found 2 possible algorithms that should solve the problem:
1.- A YouTube video where it says that i should use the Breadth-first search
2.- Blog commenting the solution of some of the problems of that ICPC year. The author says that DP (dynamic programming) can be used. In Wikipedia's page is explained an algorithm called Dijkstra's algorithm which is used for "the shortest path problem" as the page says.
Is one of these algorithms an better solution for the problem? does one of those have better performance or something like that?
...ANSWER
Answered 2018-Nov-05 at 20:50You use Breadth-first search (shortyly BFS) when the graph's edges are without weight (as your case) and Dijkstra's algorithm for weighted graph.
As a side note, remember that Dijkstra doesn't work when you have edges with negative values.
Thinking of complexity, this question might be in your interest: Why use Dijkstra's Algorithm if Breadth First Search (BFS) can do the same thing faster?
QUESTION
I need to write a python script that can match two lists of strings and return the shortest and lexographically first common parts of lists.
Lists corresponds to each other which means (a1, b1)...(aN, bN), pairs are frozen.
The rule:
...ANSWER
Answered 2018-Nov-03 at 16:06So, I ended up with clearly and early specifying situations when such combinations is not possible. For example, we know that the answering strings should start and end with the same symbols. So we can create combination and BEFORE making permutation we check for such condition. Also we can check that sum of length of all substrings inside the piece we need to check are equal. If not then we do not go for permutation and instead proceed further
Code
QUESTION
ANSWER
Answered 2017-Nov-26 at 12:08Make sure that latexmk is accessible from your command line. You can check this by typing latexmk -version from your command line. If it is not accessible from command line then you need to add the latexmk path to environment variable.
If latexmk is not installed follow this link to properly install the latexmk.
I think following these steps might fix your problem.
QUESTION
This question is taken from an ACM-ICPC Romanian archive.
You are given T tuples of the form (N, P), find the smallest number X for every tuple such that X % P == N. If this is not possible, print -1. X can only be formed using digits from the set {2, 3, 5, 7}.
Example :
3
52 100
11 100
51 1123
Output for given example :
52
-1
322352
Restrictions :
1 ≤ P ≤ 5 * 10^6
1 ≤ N ≤ P - 1
I attempted solving this problem by using a recursive function that would build numbers with digits from the given set and check if the condition is met, but that is way too slow because I have no idea when to stop searching (i.e. when there's no solution for the given tuple).
The author hints at using BFS somehow, but I really don't see any way to construct a meaningful graph using the input data of this problem.
How would you approach solving this problem?
...ANSWER
Answered 2017-Apr-22 at 20:45You can solve this with a BFS, starting from 0, where adjacent vertices to a number n are 10n+2, 10n+3, 10n+5 and 10n+7. By keeping a record of all numbers mod p already queued, one can reduce the size of the search space, but more importantly know when the whole space has been searched.
Here's a simple Python implementation:
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Install acm-icpc
Read the wiki. Anyone can edit the wiki.
Members of the BrockCSC organization have push and pull access and just need to clone this repo.
Non-members will have to fork it and send a pull request.
If you have no idea what any of that means, read through the tutorials at http://help.github.com.
Bonus points if you explain how you solved the problem
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