# 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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### Advent of Code 2018 Day 1 in OCaml: Find length of cycles when accumulating deltas

I just started Advent of Code 2018. This is exercise 2 of day 1, and I can't understand why my code is so slow (4 minutes 37 seconds, compared to 200ms for a friend who did it in Clojure with the same ...
223 views

### Find “prime polynomials” for a user's given prime, bounds, and degree

Very amateur programmer and first-time poster here. The program I wrote asks the user for a prime number, a lower and upper bound, and a degree (all of these are integers). I want to generate a list ...
359 views

### Hackerrank “Almost Equal” solution

I've spent the best part of a day on this question. It is marked as Expert level. There are about fifteen submission test cases and my solution manages to satisfy the first four. However, from there ...
27 views

### Script to report disk usage

I am trying to see how I can speed up the below script that reports disk usage. The timed find command towards the end is the problematic line that I am trying to ...
376 views

### Project Euler #119 : Digit power sum

From problem #119 of the Project Euler : The number 512 is interesting because it is equal to the sum of its digits raised to some power: 5 + 1 + 2 = 8, and 83 = 512. Another example of a number ...
738 views

### Project Euler 92: count sum-squared-digits chains that reach 89

A number chain is created by continuously adding the square of the digits in a number to form a new number until it has been seen before. For example: 44 → 32 → 13 → 10 → 1 → 1 85 → 89 →...
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### Find the length of a frequency-change cycle (Advent of Code 2018)

I tried to do the second part of the 1. December challenge of Advent of Code in Haskell. I'm fairly new to Haskell but I have plenty of experience in other (procedural) languages. I struggled with the ...
129 views

### Parallel processing simulation

Input n number of workers and m jobs to be scheduled, followed by m lines of time ...
115 views

### Finding decreasing sequences in an array of numbers

Ants Requirement Given a natural number $n$, representing the number of days the study is made, and then a number $x$ of $n$ natural numbers, representing the number of working ant ...
61 views

### How to reduce run time of my code to solve Cycle race practice problem from geeksforgeeks

I am referring to this problem https://practice.geeksforgeeks.org/problems/cycle-race/0. The Problem description: Jack and Jelly are two friends. They want to go to a place by a cycle ( Assume that ...
141 views

### A* search on 4x4 sliding tile puzzle scales poorly

I am trying to improve the time complexity of my A* search algorithm and I have tried approaching this from every which way I believe is possible. I believe I may be doing something fundamentally ...
44 views

### Incrementing specified list values, with “catch-up” [closed]

I completed a coding challenge recently in which my function was to be given two parameters: N, the number of counters to be used (numbered 1 through N) - and A, an array of integers. Iterating ...
47 views

### Combine contiguous spreadsheet cell references into larger ranges

For a hobby project, I am using openpyxl to export Excel workbooks as JSON. Part of this involves identifying the formatting applied to cells, and serializing this information (provided the format is ...
106 views

### Verify that each named sequence is strictly increasing

The master launch sequence consists of several independent sequences for different systems. Your goal is to verify that all the individual system sequences are in strictly increasing order. In other ...
196 views

### Display a number as a product of its prime factors

Task: Link to original problem :https://www.spoj.com/problems/FACTCG2/ The task in this problem is to write a number in a multiplication of prime numbers separated by “...
1k views

### Looking for a way to create a particular matrix in python in a less amount of time

I want to create a matrix like this in Python:  \begin{pmatrix} 0 & 0 & 0 & 0 & 1 & 1 & 1 & 1 & 2 & 2 & 2 & 2 & 3 & 3 & 3 & 3\\ 0 & 1 &...
183 views

### Counting average protein length from a proteome fasta file

this code is counting the average protein length (number of amino acids) across the proteome of some microbes. As it stands the code takes a very very long time to run, I think I'm being very ...
12k views

### Minimum number of swaps required to sort the array in ascending order

Here is my problem statement. An excerpt: You are given an unordered array consisting of consecutive integers ∈ [1, 2, 3, ..., n] without any duplicates. You are ...
215 views

### Top k closest pairs in a set of million 128-dimensional points [closed]

I have a set of 1 million points in 128-dimensional space. Among all trillion pairs of the points in the set, I need to get a subset of 100 million pairs whose cosine distances are less than that of ...
2k views

### MAXSPPROD linear algorithm

I am working on the MAXSPPROD problem on interviewBit You are given an array A containing N integers. The special product of each ith integer in this array is defined as the product of the ...
184 views

### Project Euler 378: Count ordered triplets whose triangular numbers have decreasing number of factors

Project Euler problem 378 says: Let $T(n)$ be the $n$th triangle number, so $T(n) = {n (n+1) \over 2}$. Let $\mathit{dT}(n)$ be the number of divisors of $T(n)$. E.g.: $T(7) = 28$...
121 views

### Program that finds prime numbers in a specific range

I'm kinda new to programming, and as a solution to an exercise, I made a program to find prime numbers in a range. It runs just right for small ranges of numbers, but for this exercise we are given a ...
310 views

### Npuzzle solver using A* with Manhattan + Linear Conflict (Updated Code)

Here is the old thread that I started out with. The code I've got now is vastly different thanks to those two. What I have now functions fairly well and looks pretty good. I've managed to work it back ...
1k views

### N-puzzle solver using A* with Manhattan + Linear Conflict

I've been working on this solution for a couple days now. Finally managed to get it to work and I got it to where it solves about half of the time. The other half goes for so long that it eventually ...
466 views

### “Spread the Word” CodeChef challenge

I am solving the "Spread the Word" problem on CodeChef: Snackdown 2019 is coming! People have started to spread the word and tell other people about the contest. There are $N$ people numbered 1 ...
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### TLE in FOXLINGS SPOJ

Problem Statement: FOXLINGS It’s Christmas time in the forest, and both the Fox and the Wolf families are celebrating. The rather large Fox family consists of two parents as well as $N$ (\\$...
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### Efficiently determining maximum allowed euclidean distance between lists of colors

I was recently tasked with determining which hex RGB colors in list color_list are nearest to each hex RGB color in list target_colors, using euclidean distance as the measuring stick, and only ...
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### Counting paths between 3 cities in C++

The task is to make a program that prints out how many possible paths a driver can use to visit three cities so that he visits each city exactly n times. The program must be executed within 1 minute ...
540 views

Ok, now for some time I've been trying to conquer this challenge without success performance wise. And I'd like some hints about approaching this problem, or the general algorithms I should learn ...
102 views

### Prime number generation - SPOJ

This is a program to generate prime numbers for a given range. The sieve of Eratosthenes algorithm was implemented, but still the SPOJ says time limit exceeded. Where can some optimizations be made? ...
201 views

### MaxCounters Codility Challenge

I've been doing some Codility challenges lately and the MaxCounters challenge got me stumped: You are given N counters, initially set to 0, and you have two possible operations on them: ...
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### Text extraction of document files

I have this script that pulls text out of .docx, .doc and .pdf files and uploads that text to an Azure SQL Server. This is so users can search on the contents of those documents without using Windows ...
129 views

### Prime number segmented sieve

I tried to solve the SPOJ prime number problem below. The code produced correct results, but Time limit exceeded and also memory need around 970M which is not efficient(?) How can I optimize this ...
213 views

### TLE in JNEXT problem in SPOJ

Problem Statement: JNEXT DevG was challanged to find the just next greater number which can be formed using digits of a given number. Now DevG needs your help to find that just next greater number ...
66 views

### Search father (x) of the number D(x) and measure time and memory consumed

We define function D(x) as following: D(x) = x + sum of digits of x + sum of prime factors of x then call x the father of D(x) Write a program that gets input ...
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### User form that searches a spreadsheet

I have this userform that looks up into a sheet. The problem is that when there are a lot of rows to look up it takes too long to execute (for example 100 thousand rows). Is it possible to reduce the ...
601 views

### Time complexity of Max counters

As per the instructions are given in MaxCounters-Codility, You are given N counters, initially set to 0, and you have two possible operations on them: <...
1k views

### Morgan and a String HackerRank challenge

I am solving a HackerRank problem called 'Morgan and a String'. Given two strings, each consisting of up to 105 uppercase characters, the task is to form the lexicographically smallest string from ...
84 views

### INCARDS SPOJ challenge

Question- In short question says that you have N bus stops and K bus routes. Every bus routes is linked to two bus stops. Each route has some cost of travelling. It says one person visit any ...
227 views

### Largest prime factor function

I have written a function which finds the largest prime factor of some number. This function works but the problem is that it is too slow. For instance, when I enter 600851475143 as a parameter, the ...
503 views

### Dynamic Programming solution for one pile nim game

I have solved the following problem using dynamic programming: Little Deepu and his Girlfriend 1. To paraphrase, We have two players Little Deepu and Kate and M items in the bag B, also we have ...
37 views

### Time complexity of tape equilibirum

As per the instructions on this Tape Equlibrium-Codility I've written the code ...
106 views

### Longest Collatz sequence in Scala

I am trying to find the longest Collatz Sequence: Which starting number, ≤ N, produces the longest chain? If many possible such numbers are there print the maximum one. (1 ≤ N ≤ 5×106) I tried ...
2k views

### Sort characters in a Python string by frequency

I wrote a solution to the leetcode problem Sort characters by frequency and the solution passes 34/35 test cases. On the last test case, there is a "time limit exceeded" error with an input string of ...
220 views

### CodeForces: Creating the Contest

I wrote a solution to this question. The task is to take an input of n increasing positive integers (1 ≤ n ≤ 2∙105), each entry as large as 109, and find the length of the longest subsequence where ...
243 views

### Prime pair set finder (Project Euler problem 60)

I made a code that can find the prime sets: The primes 3, 7, 109, and 673, are quite remarkable. By taking any two primes and concatenating them in any order the result will always be prime. For ...
2k views

### Hacker Rank Challenge : Find count of substrings which are special palindrome

I am getting timeout for test cases having very large input. -= Challenge Link =- -= Test case example =- Code is working fine as can be checked on ideone. (Note: Here ...
958 views

### Project Euler Problem 21 in Python: Summing amicable numbers

Let d(n) be defined as the sum of proper divisors of n (numbers less than n which divide evenly into n). If d(a) = b and d(b) = a, where a ≠ b, then a and b are an amicable pair and each of a and b ...