Questions tagged [dynamic-programming]
Dynamic programming is an algorithmic technique for efficiently solving problems with a recursive structure containing many overlapping subproblems.
296 questions
5
votes
2
answers
194
views
LeetCode Number 416: Partition Equal Subset Sum
Problem: MLE
I am confused as to why the LeetCode judge reports Memory Limit Exceeded when my solution looks close to the editorial solution. I not too familiar with ...
- 53
5
votes
3
answers
996
views
LeetCode 678: Valid Parenthesis String, Recursion memoization to DP
How can the following recursion + memoization code be converted into a tabulation format dynamic programming solution?
The code is working, but I want to improve it.
The challenge I am facing is ...
4
votes
1
answer
125
views
Calculate optimal game upgrades, v2
This is the second iteration of the code I originally posted here: Calculate optimal game upgrades. Based on the feedback there, I chose to change the code to use a dynamic programming approach with ...
- 95
1
vote
1
answer
109
views
Finding the number of distinct decompositions a number has using only repdigits
This is a problem from a previous semester that I am trying to upsolve. I am trying to solve a problem involving the total number of ways of decomposing a number using only repdigits. A repdigit is a ...
- 59
2
votes
1
answer
57
views
Optimal Extraction of Longest Sorted Sequence from Individually Sorted Bucket Arrays Without Repetitions
Consider a bucket array containing sorted and/or empty buckets, and the goal is to extract the longest possible sequence in sorted order, under the following conditions:
Only one element in each ...
- 121
6
votes
1
answer
352
views
Codeforces: D2. Counting Is Fun (Hard Version)
The code works okay for the following problem.
Problem
An array 𝑏 of 𝑚 non-negative integers is said to be good if all the elements of 𝑏 can be made equal to 0 using the following operation some (...
- 244
5
votes
2
answers
966
views
C++ - Secretary Problem using dynamic programming
I tried using dynamic programming to get a solution to the Secretary Problem. It seems to me it's working with with expected result. I really didn't want to use ...
- 153
1
vote
3
answers
138
views
Another ATMs cash-out (denomination) algorithm in Java
Related to this question and this answer, I would like to have a second review from you on a modified version.
The problem I tried to solve
Some kind of "Minimum count of numbers required from ...
- 762
2
votes
5
answers
312
views
Sum of bitwise XOR of each subarray weighted by length
here is the problem statement
You are given an array a of length n consisting of non-negative integers.
You have to calculate the value of \$\sum_{l=1}^n \sum_{r=l}^n f(l,r)\cdot (r - l + 1)\$ where \...
1
vote
1
answer
606
views
Leetcode: 2327. Number of People Aware of a Secret
On day 1, one person discovers a secret.
You are given an integer delay, which means that each person will share the secret with a new person every day, starting from delay days after discovering the ...
- 21
4
votes
2
answers
138
views
Find largest sum not involving consecutive values
There is a question to basically find the largest sum in an array, such that no two elements are chosen adjacent to each other. The concept is to recursively calculate the sum, while considering and ...
- 43
2
votes
1
answer
220
views
k-dice Ways to get a target value
I'm trying to solve the following problem:
You have a k-dice.
A k-dice is a dice which have k-faces and each face have value written from 1 to k.
Eg. A 6-dice is the normal dice we use while playing ...
- 222
1
vote
1
answer
174
views
Longest (more or less) ideal subsequence
An ideal subsequence is a subsequence of a string, where the distance between adjacent characters in the subsequence is bounded by a maximum, i.e. \$\lvert c[i] - c[i\pm 1] \rvert \leq k\$
Example:
...
- 11
2
votes
2
answers
167
views
Making my DP algorithm faster - longest palindromic substring
The following code is my solution to a LeetCode question - find the longest palindromic substring. My code is 100% correct, it passed once but it took too long, and in most of the reruns I hit a "...
- 123
1
vote
2
answers
1k
views
Leetcode 55. Jump Game solution
I was working on Jump Game problem on leetcode
Question
You are given an integer array nums. You are initially positioned at the array's first index, and each element in the array represents your ...
- 189