avinashselvam
/ coin_change.py
Created
December 30, 2018 18:09
function to calculate coin change recursively using dynamic programming
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| n = 10 | |
| c = [2, 3, 5, 6] | |
| ways = [[0 if i < min(c) else - 1 for i in range(n + 1)] for j in c] | |
| def num_ways(n, c): | |
| row = len(c) - 1 | |
| # base case | |
| if n < min(c): return 0 | |
avinashselvam
/ longest_increasing_subsequence.py
Created
January 9, 2019 05:10
function to calculate Longest Increasing Subsequence given an array of unsorted integers
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| def find_k(arr_i, l ,r, ends): | |
| # ends here is a sorted array. | |
| # binary search | |
| while r - l > 1: | |
| m = (l+r)//2 | |
| if arr_i <= ends[m]: r = m | |
| else: l = m | |
| return r | |
avinashselvam
/ filter.swift
Created
June 19, 2019 11:15
A swift class that implements GPU based image processing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // | |
| // filter.swift | |
| // fltr | |
| // | |
| // Created by Avinash on 18/06/19. | |
| // Copyright © 2019 eightyfive. All rights reserved. | |
| // | |
| import Metal | |
| import MetalKit |
avinashselvam
/ autodiff.py
Created
May 9, 2020 12:32
example of forward and backward automatic differentiation on a computational graph
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| class Constant(): | |
| def __init__(self, value): | |
| self.value = value | |
| self.gradient = None | |
| def evaluate(self): | |
| return self.value | |
| def derivative(self, wrt_variable): |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| class Node: | |
| """ | |
| Vertex / Node in a bipartite graph | |
| Attributes | |
| ---------- | |
| id : int | |
| Unique identifier within a set | |
| set: int |