Questions tagged [dynamic-programming]
Dynamic programming is an algorithmic technique for efficiently solving problems which have recursive structure with many overlapping subproblems. Do NOT use this tag for general "dynamic" behavior in code.
dynamic-programming
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Maximizing sum of signed numbers by not skipping more than one consecutive value: DP goes wrong
I am trying to solve this code challenge:
A user maintains a list of negative and positive ratings for movies in a collection. The user wants to choose some subsequence of movies from the collection ...
- 341k
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Finding Longest Palindromic Substring, solution is too inefficient but I am not convinced dp is more efficient in this case
I have a solution which is O(n^2).
My idea loop through each character of the given string and find longest possible odd and even substring which results in a palindrome.
Why does my solution take so ...
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There a DP code for question edit distance from CSES problem set and i solved using python in most optimized way but its giving TLE [closed]
import sys
input = sys.stdin.read
def edit_distance(s1, s2):
n1, n2 = len(s1), len(s2)
prev_row = list(range(n2 + 1))
curr_row = [0] * (n2 + 1)
for i in range(1, n1 + 1):
...
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A more efficient algorithm in 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 ...
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Dynamic Programming for Minimum Operations to Equalize Arrays - Incorrect Results
I'm trying to solve a problem where we need to find the minimum number of operations required to make two integer arrays nums and target (same length) equal. In one operation, we can select a subarray ...
- 9,543
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21
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Efficiently store a dynamic increasing dataset and make computation on it
I want to write a python program that will compute the price of different groceries baskets as their constituants change.
I have a csv file with the constituents of each basket.
PS: a basket can ...
- 748k
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Performance Comparison Between Tabulation and Memoization for Dynamic Programming [closed]
I'm delving into dynamic programming and trying to understand the general performance differences between tabulation and memoization. Both techniques aim to optimize recursive algorithms by storing ...
- 480
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3
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125
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Python lambda function in a list gives unexpected result
So I'm trying to make a list where a lambda functions are the elements of the list. The lambda function calls
another function which I pass an argument to. The problem is that lambda function only '...
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Flip consecutive zeroes to ones in k operations to have maximum number of ones, find the maximum number of ones
You are given a binary string made of 0 and 1, and a value k which represents number of operations. You can flip consecutive 0s in each operation to 1s. Find the maximum number of 1s after k ...
- 341k
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Recusion: does the order of safety checks vs base cases matter?
I am learning dynamic programming, and I have observed when creating recursive code, sometimes we check out-of-bounds conditions first then check other base cases, and sometimes we check the other ...
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Maximum difference of sum of odd and even index elements of a subarray
Given an array of N integers (can be positive/negative), calculate the maximum difference of the sum of odd and even indexed elements of any subarray, assuming the array follows 0 based indexing.
For ...
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2
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62
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Understanding dynamic programming timeouts with 2 different solutions
The problem is from leetcode (link - https://leetcode.com/problems/the-number-of-ways-to-make-the-sum/description/ )
You have an infinite number of coins with values 1, 2, and 6, and only 2 coins with ...
- 3,788
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4
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The minimum size of substrings for the presence of at least one character
i have a question that want the minimum length of k that in each consecutive substring of a string with length k, There must be at least one common character.
for example if s="abcaca"
for k ...
- 86k
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Single Source - Single Destination Shortest Path (DFS + DP) - Time complexity?
Context:
I want to write an algorithm for finding the shortest(least cost) path from a fixed source to a fixed destination node in a weighted directed graph with non negative weights (can have cycles)....
- 341k
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Dynamic Programming - Minimum cost to fill given weight in a bag
We are given an array of positive weights cost where cost[i] represents the cost of filling i + 1 kg's of oranges in a bag (0-based indexing). We need to find the minimum cost to buy exactly w kg's of ...
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