Questions tagged [time-limit-exceeded]

When the code scales so poorly in the face of large inputs that it cannot complete in a reasonable amount of time, use this instead of the [performance] tag.

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Generate a large block diagonal covariance matrix with exponential decay

I am implementing Kalman filtering in R. Part of the problem involves generating a really huge error covariance block-diagonal matrix (dim: 18000 rows x 18000 columns = 324,000,000 entries). We denote ...
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Coding Challenge: Kattis - Antiarithmetic?

Short problem description: A sequence of numbers are antiarithemtic if there exists no three numbers a_i, a_j, ...
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1answer
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Finding the number of times the code will generate an alert depending upon whether the transaction is fraudulent

Please refer to this problem from Hackerrank HackerLand National Bank has a simple policy for warning clients about possible fraudulent account activity. If the amount spent by a client on a ...
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almostIncreasingSequence CodeSignal [closed]

I have this issue. 35/38 sample tests passed. Execution time limit exceeded on test 36: Program exceeded the execution time limit. Make sure that it completes execution in a few seconds for any ...
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Google Foobar challenge “queue-to-do” Python partial test case errors [closed]

I started foobar challenge a few days ago, and I'm now in the 3rd stage first question, and I've got the "Queue-to-do" challenge. The problem is that I get some partial errors in the verifying process....
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71 views

Optimising iteration and substitution over large dataset

I have the following code: ...
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2answers
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Jump Game - Leetcode

Below is my solution for the LeetCode Jump Game Given an array of non-negative integers, you are initially positioned at the first index of the array. Each element in the array represents ...
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Graph-coloring solution using depth-first search

I'm trying to solve this question: Andryusha goes through a park each day. The squares and paths between them look boring to Andryusha, so he decided to decorate them. The park consists of n ...
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Finding a vertex of a tree such that every subtree rooted at that vertex is of a uniform color

I'm trying to optimally solve codeforces problem 763A: Each New Year Timofey and his friends cut down a tree of n vertices and bring it home. After that they paint all the n its vertices, so ...
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Finding sum of divisors of numbers between the range (1 to 1e16)

The exact link to the question : https://www.spoj.com/problems/DIVSUM2/ Input: An integer stating the number of test cases (equal to 500), and that many lines follow, each containing one integer ...
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1answer
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Agent based model in Python

My model is based on the Ultimatum Game. I won't go into the intuition behind it but generally speaking it functions as follows: The game consists of a n × n lattice on which an agent is placed at ...
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Bit-based universe simulation

I am working with this problem (https://open.kattis.com/problems/whowantstoliveforever). As the problem states, my program has to determine if the universe lives or dies based on the input 0s and 1s. ...
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Fastest path on a snakes and ladders board

I am not looking for a detailed review of this code as I am aware it is very inefficient. The main reason for posting this is to see if there is a better way to achieve my goal (I am certain there ...
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Python program to find a word ladder transforming “four” to “five”

I saw this Puzzling problem and thought I would try to write a Python program to solve it. The task is to transform "four" to "five", forming a new four-letter word at each step, replacing one letter ...
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Program for activity selection exceeds time limit

I've been trying to solve this problem for some while and the solution I have come up with exceeds the lime limit by 1-3 ms and 2 out of 10 tests get a memory issue error. Why is that? This is the ...
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511 views

Finding dictionary keys whose values are duplicates

I currently have a dictionary (Duplicate_combos) that has a unique identifying number for the key value and the value is a list with two elements, a company code ...
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Google “Wiggle walk”

I am doing Kickstart's problem Wiggle Walk. I have tried to code with matrix, dictionary and nested dictionary but the time exceeds the limit in each submition. Can anyone help me optimize it better ...
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Solution to Kickstart's Wiggle Walk

I'm trying to optimize my solution to Wiggle Walk for Kickstart's round 1C. Problem Banny has just bought a new programmable robot. Eager to test his coding skills, he has placed the robot ...
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Yandex programming contest: Alarms

I've tried to solve this challenge about 4 hours during the contest, but all my attempts exceeded the time limit. I tried to solve it with min-heap, but can't pass all the tests. How it can be solved ...
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Finding collisions of the first few bits of a SHA-1 hash

My objective is to find a hash collision of my modified hash function. Assuming my modified hash only outputs the first 36 bits of SHA-1. As we know, SHA-1 is a 160-bit hash value, hence, we only need ...
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Bias-corrected percentile Bootstrapping Optimization

I have never posted to this forum, but was referred here. I need some help printing key iterations as well as optimizing my code for run time. If someone had some time to help/explain how to correct ...
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3answers
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Calculate the nth Fibonacci number, mod m

I was trying to output F(n) mod m to find the remainder of Fibonacci number, where F(n) could be a very big number: ...
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1answer
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HackerRank New Year Chaos: arriving at a given list using neighbor swaps

I am trying to solve the HackerRank New Year Chaos problem where the aim is as follows: A vector of size n is having values ...
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1answer
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Project Euler #357: Prime generating integers

Project Euler Problem 357 asks: Consider the divisors of 30: 1,2,3,5,6,10,15,30. It can be seen that for every divisor d of 30, $$d+30/d$$ is prime. Find the sum of all positive integers n ...
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CodeChef Matches challenge

I am solving some problems from CodeChef but I am stuck on the Matches problem: Ari and Rich are playing a pretty confusing game. Here are the rules of the game: The game is played with ...
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Birthday paradox simulation

I'm writing a simulator which checks how many balls we need to occupy every box or how many balls we need for any box has at least 2 balls (birthday paradox). I wrote the script in python and it is so ...
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Hackerrank.com - Sherlock and Anagrams

Summary: Given a string find the number of anagramic pairs of substrings of it. e.g 'abba' pairs are [a,a],[b,b],[ab,ba],[abb,bba] so we have 4 pairs. I'm wondering if anyone can help me improve my ...
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Calculating pi via collisions

This code calculates pi via collisions; it asks for a user input of N which determines the mass of the second block. It is fully working, it just takes forever to run when N >= 2. I want to be able ...
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Hackerrank: Computer Game (max-flow problem with integer factorization)

I am working on a coding challenge from the Hackerrank site. Given two equal-length arrays of integers, with values from 2 to 109, find the maximum number of times we can remove a pair (Ai, Bj) where ...
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A faster way to compute the largest prime factor

I am self-learning js and came across this problem(#3) from the Euler Project The prime factors of 13195 are 5, 7, 13 and 29. What is the largest prime factor of the number 600851475143 ? ...
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TLE error: Remove element from LinkedList [closed]

I am working on an easy LinkedList basic operation problem on Remove Linked List Elements - LeetCode Remove Linked List Elements Remove all elements from a linked list of integers that ...
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2answers
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New Year Chaos JavaScript, needs to be sped up

Similar to this question but this is for Python Original problem with description on hacker rank I am currently trying to iterate through a large number of arrays and count how many times numbers ...
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1answer
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Time limit exceeded in K-th symbol in Grammar (LeetCode)

I am taking efforts to solve problem K-th Symbol in Grammar - LeetCode K-th Symbol in Grammar On the first row, we write a 0. Now in every subsequent ...
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1answer
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Finding the upper and lower bound using binary search

I am trying to solve this InterviewBit question https://www.interviewbit.com/problems/search-for-a-range/. My code for this seems to be working properly and it does give me the correct answers on my ...
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Solution to Codejam 2019's Pylons

I'm trying to solve Pylons from the 2019's round 1A. Problem Our Battlestarcraft Algorithmica ship is being chased through space by persistent robots called Pylons! We have just teleported ...
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1answer
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Merging records from one spreadsheet into another

I have created the code below that compare two spreadsheets . It initially compares the range of value from sheet1 ("Status") to sheet2 ("Interface") . Whenever a range matches with the ranges present ...
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1answer
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Google Kick Start Practice Round 2019 - Mural

My code exceeds the time limit on the second test set. A suggestion/hint of a better algorithm would be appreciated. Problem Thanh wants to paint a wonderful mural on a wall that is N ...
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1answer
80 views

Sum of number's quotients when divided by exact powers of 2

Problem I have written code to solve this challenge: Given a formula: GCD(x,y) means the GCD (Greatest Common Divisor) of x and y. For example: if N=2, then: f(2) = 1/GCD(1,...
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1answer
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Programming Challenge from Kattis: Distinctive Characters

I'm currently working on this problem from Kattis. In short, we're supposed to find the string that has the least similarity to any other string given. Every element of a string is either 0 or 1. ...
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1answer
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Exceeded time limit to solve super pow

I tried to solve the Super Pow - LeetCode Super Pow Medium Your task is to calculate ab mod 1337 where a is a positive integer and b is an extremely large positive integer given in ...
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3answers
108 views

Looking for all numbers where each digit is bigger than the previous digit

This is the "Increasing Number problem", where we are looking for all numbers with \$n\$ digits where each digit is bigger than the digit before it. Or in Mathematical therms where: $$\mathit{...
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1answer
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Kattis Problem 'Mali'

I wrote a solution to the Mali problem on Kattis: Given inputs a1, a2, a3, …, an and b1, b2, b3, …, bn, determine n pairings (ai, bj) such that each number in the A sequence is used in exactly one ...
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Heights of Cats

I have an assignment to solve this problem. However, I have exceeded the time limit required, can anyone suggest where to improve my code? Cats like to sit in high places. It is not uncommon to see ...
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1answer
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Transmission Of Messages

I have an assignment to solve this problem. Problem Description Bob the Cat is building a new system, dubbed the Cats Transmission System (CTS). This horribly inefficient system utilises cats to ...
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1answer
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Finding maximum homework grade ECOO 2018

I'm trying to solve ECOO 2018 round 2(regionals) question 2 to prepare for the upcoming contest. Basically, in the question George has to achieve the maximum possible grade by completing the right ...
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The number having odd divisors between 2 numbers

I am trying to solve a problem from Hackerearth. I'm able to solve sample testcases but somehow when I am submitting the solution it gives time limit exceeded error or wrong output message. Problem ...
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1answer
356 views

A binary search solution to 3Sum

I tried a binary solution to 3Sum problem in LeetCode: Given an array nums of \$n\$ integers, are there elements \$a\$, \$b\$, \$c\$ in ...
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Hackerrank All Women's Codesprint 2019: Visually Balanced Sections

Link: https://www.hackerrank.com/contests/hackerrank-all-womens-codesprint-2019/challenges/visually-balanced-sections/problem Problem Description A rack has \$n\$ horizontal compartments. The ...
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lowest common ancestor with square root decompostion

This is my implementation of lowest common ancestor problem,I tried to solve it using square root decomposition pre processing time : O(n) query time:O(sqrt(h)) h -> height of tree This ...
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1answer
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GreetingCard problem with Coordinates

This is a practice problem on Kattis I have exceeded the time limit for the 5th out of 11 test case. Can anyone inspire me what could be done to optimize the code? Problem Description Quido plans ...