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
5,689
questions
-9
votes
0
answers
54
views
how can i find the minimum sub array? [closed]
The candies supermarket sells m different types of candies and has n consecutive boxes, each box contains a single type of candy, you are allowed to buy only some contiguous boxes of candies (i.e. the ...
1
vote
4
answers
72
views
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 ...
- 11
1
vote
1
answer
86
views
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)....
- 59
0
votes
2
answers
60
views
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 ...
- 5
2
votes
0
answers
46
views
Coin Change Recursive, memoization gone wrong
I'm trying to understand why first one fails and second works, all I'm doing is passing along coinTrack, call it redundant but why does it not work?
It works without memoization, but on using ...
- 333
-1
votes
1
answer
45
views
Coin Change II : To take a value or not to
The problem goes like this:
You are given an integer array coins representing coins of different denominations and an integer amount representing a total amount of money.
Return the number of ...
- 5,005
2
votes
4
answers
99
views
Is there a way initialize a matrix(2D array) with some default values(-1)
I was going through a dp problem, there I have to initialize the matrix with default(-1) values for memoized solution. And felt the need.
We can initialize the 1D array in java like this => Arrays....
- 29
0
votes
1
answer
19
views
order of writing base cases in recursion how to figure out based on quesion
I am learning dynamic programming I have observed when solving recursive code soemtimes we check out of bound conditiosns first then check other base cases and sometimes it is we check the other bases ...
1
vote
1
answer
98
views
Asteroid Mining - Dynamic Programming problem
I was given the following assignment:
There is n gram of mineral to be dug up on a certain asteroid. At the beginning there is only one robot at our disposal. Each robot can do one of two activities ...
- 51
0
votes
2
answers
92
views
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 ...
- 29
4
votes
3
answers
239
views
Minimum Cell Changes to Ensure Unique Numbers in Each Row and Column of an n×n Table
We have an n×n table, and in each cell of the table, there is a number from 1 to 2n. We want to change the numbers in some of the cells and replace them with other numbers from 1 to 2n such that in ...
- 41
1
vote
1
answer
60
views
Why backtracking is giving wrong results in case of 1st question and correct results for 2nd. Leetcode #322 #78 respectively
You are given an integer array coins representing coins of different denominations and an integer amount representing a total amount of money.
Return the fewest number of coins that you need to make ...
- 31
1
vote
2
answers
125
views
Dynamic programming partition array to find minimum difference fails for negative numbers
I am trying to solve the problem it works for positive integer arrays but fails for negative test cases. How to handle the below test case?
You are given an integer array nums of 2 * n integers. You ...
- 151
0
votes
0
answers
8
views
why this code is giving error in solve_spo function but not in other function use . the solve_spo function is derived from the solve_tabu function
int solve_tabu(int N ,int arr[],int t){
vector<vector<int>> dp(t+1,vector<int>(N+1,0));
for(int i=0;i<=N;i++){
dp[0][i]=1;
}
for(...
0
votes
0
answers
11
views
DynamicProgramming Proble,
Problem Link :https://www.geeksforgeeks.org/problems/count-numbers-containing-43022/1
Problem Description : You are given a number n, Return the count of total numbers from 1 to n containing 4 as a ...
- 1