MSTICK - Editorial

editorial
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9

Hi the segment trees section in the top coder tutorial only explains how to initialise the tree n query for a minimum in a given interval … could someone pls spare few mins explaining wat changes must be made to that algorithm to fetch the maximum in the given interval … It would be really very helpful … apologies if its a silly question …

10

hi mkagenious. I have tried and tried but getting a wrong ans. I have also looked at others solutions, but cant find any faults in mine. Could you please help me? My submission ID : 2172602.

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11

please some one help me in this code…http://www.codechef.com/viewsolution/2172202...giving wrong answer…cross checked many times… :frowning:

12

Wrote the code using RMQ. Can anybody guess where did I go wrong ?

4 Likes
13

I am solving this problem in O(Qroot(N)) but getting WA. I dont know where the code is failing,please check it once.

here is Ideone the link.

14

@mkagenius I again changed the code but getting WA :frowning: please help me :frowning: my solution id is :-2183210

15

I implemented a Python solution for this problem and it is as fast as the few Python AC ones but I got TLE. Can someone spot the issue ? CodeChef: Practical coding for everyone

16

Hey , I followed the first approach (finds range min query in time O(rootN)) . Upon submitting the code , I am getting Runtime Error. CodeChef: Practical coding for everyone

Total Memory Limit for this 50000 bytes.I declared two arrays of size 10000 each. So , it takes 80000 bytes [2*40000 bytes]. Is this the reason for the error ?

But, I have seen solutions using two arrays getting accepted.

17

I have implemented the segment tree and correct approach , it is working for basic test cases but giving WA can somebody see CodeChef: Practical coding for everyone

18

i m getting WA for the question MSTICK Problem - CodeChef but not able to figure out why… kindly help… my solution is

19

I get WA,can anyone tell me what am I doing wrong?
My submission- CodeChef: Practical coding for everyone

20

Hey Though I have test a lot of test cases and have considered the double part still the WA…:frowning:
heres my sol: CodeChef: Practical coding for everyone .plz help…:frowning:

21

Can anyone please find the error.The code is working on all test cases I could find,but could not locate the error,getting WA.
Plz Help…

22

Hey I have used 2 segment trees for implementation. But still, I am getting wrong answer. Can’t figure out why. Could anyone please help me out? Solution : CodeChef: Practical coding for everyone

23

CodeChef: Practical coding for everyone Can view my sol here. Not getting where is the prob,getting correct answer for all test cases

24

unable to figure out whats wrong with this?
http://www.codechef.com/viewsolution/3963394

25

What would the fault be in my solution?
http://www.codechef.com/viewsolution/4069045

26

I am trying to solve the problem matchsticks MSTICK Problem - CodeChef

I used segment tree data structure still I get TLE with a complexity O(2N + Q4*log(N))

where O(2N) for building 2 segment trees and O(4Q*log(N)) for running 4 queries on the segment tree for each query Q.

Can somebody please correct me if I am wrong about the complexity of my algorithm or help me find out why do I get TLE ?

I would appreciate it, thanks :slight_smile:

Here is my solution CodeChef: Practical coding for everyone

27

The below line, seems to give errors.

f=b;
f+=(a*(1.0)-b)/2;

While,

f=b;
f+=a;
f/=2;

gives, AC. I am perplexed, what is causing the error ?
AC Solution and WA Solution.

28

Can anyone find error in my code?It’s working fine for the given test cases.I have made two segment tree one for minimum range query and another for maximum range query.http://ideone.com/EvLByN is giving me WA