Python – Page 27 – Code Says

Solution to Perm-Check by codility

19 Jan

Question: http://codility.com/demo/take-sample-test/perm_check Question Name: PermCheck This question is a simple variant of the counting question. The Python solution is:

def solution(A):

counter = [0]*len(A)

limit = len(A)

for element in A:

if not 1 <= element <= limit:

return 0

else:

if counter[element-1] != 0:

return 0

else:

counter[element-1] = 1

return 1

The Java solution is:

class Solution {

public static int solution(int[] A) {

int[] counter = new int [A.length];

for(int i= 0; i< A.length; i++){

if (A[i] < 1 || A[i] > A.length) {

// Out of range

return 0;

}

else if(counter[A[i]-1] == 1) {

// met before

return 0;

}

else {

// first time meet

counter[A[i]-1] = 1;

}

return 1;

}

Solution to Tape-Equilibrium by codility

16 Jan

Question: http://codility.com/demo/take-sample-test/tape_equilibrium Question Name: TapeEquilibrium The variable of head stores the sum of the heading part of the tape. And the variable of tail stores the sum of tailing part. Then, we move the index from 2nd position to the … Read More »

Solution to Perm-Missing-Elem by codility

16 Jan

Question: http://codility.com/demo/take-sample-test/perm_missing_elem Question Name: PermMissingElem or PermMissingElement The main challenge of this question is the XOR operations: X^X=0, and 0^X=X. Logically, the addition and subtraction operations also are able to do this work. But taking the overflow in computer into … Read More »

Solution to Frog-Jmp by codility

15 Jan

Question: https://codility.com/demo/take-sample-test/frog_jmp Question Name: FrogJmp This is a very easy question. If with C, one statement is enought. UPDATE on 2017/11/29: Codility changed Python from 2.X to 3.X. So the integer division needs to be updated to “//” from “/”. … Read More »

Set Up a Private Airfare Watchdog by Your Own

11 Nov

There are some public airfare watchdogs online. But we still have tons of reasons to set up a private one. For example, we do not want to share our email address, considering privacy and/or spam. Additionally, private watchdog has quicker … Read More »

Find a Duplicate Item In an Array of Shuffled Consecutive Integers

16 Mar

Question: if you hava an array with n integers. These integers are in random order. And each interger is between 1 and n-1, including 1 and n-1. Additionally, there is one and only one integer, which appears twice, while all … Read More »

An Example of Python and libpcap (pcapy)

26 Oct

Long long ago, I wrote this piece of code, with Python and pcapy, for my project. Today I put it on my blog, partly for recording, and partly for memento. This program read the data in libpcap file format, filter … Read More »

tl;dr: Please put your code into a <pre>YOUR CODE</pre> section.

Hello everyone!

If you want to ask a question about the solution. DO READ the post and comments firstly.

If you had some troubles in debugging your solution, please try to ask for help on StackOverflow, instead of here.

If you want to post some comments with code or symbol, here is the guidline.

1. To post your code, please add the code inside a <pre> </pre> section (preferred), or <code> </code>. And inside the pre or code section, you do not need to escape < > and &, e.g. no need to use < instead of <.

2. To use special symbols < and > outside the pre block, please use "<" and ">" instead.

3. If you have a comment with lots of < and >, you could add the major part of your comment into a <pre class="decode:true crayon-inline "> YOUR COMMENTS </pre> section.

Finally, if you are posting the first comment here, it usually needs moderation. Please be patient and stay tuned. Thanks!

CodeSays.com Admin

Ovi February 12, 2024 at 11:14 pm on Solution to Min-Perimeter-Rectangle by codilityExactly my question too. I tried something very similar to Sheng's solution, importing the math module and using sqrt(). Codility marked it only as 80%,...
Doron Ben Ari February 11, 2024 at 4:10 am on Solution to Min-Avg-Two-Slice by codilityInspired by Sheng's great solution, I wrote the following proof: Assume you found the slice with minimal average. Assume the first two consecutive elements of...
Ovi February 4, 2024 at 9:03 am on Solution to sigma2012 (Stone-Wall) by codility def solution(H): heights = H # geometric logic: the blocks need to be cuboid, all sides are rectagular. Nothing fancy, means that the angles...
Ovidiu Oprea February 2, 2024 at 11:06 am on Solution to Fish by codilityIt's the reason why it took me 2 weeks to finish this task (in the context of adult life with non-dev job). I was trying...
Ovi January 15, 2024 at 2:40 pm on Solution to Brackets by codilityThanks for this blog post! I was banging my head against the wall thinking this is a simple / short solution, where you just build...
parikshit verma July 5, 2023 at 8:26 am on Solution to Missing-Integer by codility def missingnum(a): st=min(a) en=max(a) b=set(range(1,en+2)) if (en<1 or st>1) : return 1 else: return min(b-set(a))
Pavankumar Nandeshwar June 26, 2023 at 8:07 am on Solution to Dwarfs-Rafting by codilityOk fixed it. gives 100%: int solution(int N, string &S, string &T) { int q = N / 2 * N / 2; int lf...
Pavankumar Nandeshwar June 26, 2023 at 5:23 am on Solution to Dwarfs-Rafting by codilityCan someone explain what is wrong with my solution in C++ ? int solution(int N, string &S, string &T) { int q = N /...
Pavankumar Nandeshwar June 23, 2023 at 10:25 pm on Solution to Flood-Depth by codilityMy C++ Solution. O(N) #include <climits> int solution(vector<int> &A) { int max_depth {}; int max_lvl = {}; int min_lvl = INT_MAX; for (unsigned int i...