drem-darios

def longest_substring_with_k_distinct(str, k):
  windowStart = 0
  uniqueCharacterCount = {}
  longestRun = 0
  currentRun = 0
  uniqueCharacters = 0
  for windowEnd in range(len(str)):
    nextCharacter = str[windowEnd]
    nextCharacterCount = uniqueCharacterCount.get(nextCharacter)
    # We have seen this character already to increment its count

drem-darios

def remove_duplicates(arr):
  firstPointer = 1
  secondPointer = 1
  while secondPointer < len(arr):
    if arr[firstPointer - 1] != arr[secondPointer]:
      # Replace duplicate with non duplicate
      arr[firstPointer] = arr[secondPointer]
      firstPointer += 1
    secondPointer +=1
      

drem-darios

def dutch_flag_sort(arr):
  n = len(arr)
  frontPointer = 0
  backPointer = n - 1
  solutionIndex = 0

  while solutionIndex <= backPointer:
    # Swap the 0s
    if arr[solutionIndex] == 0:
      swap(solutionIndex, frontPointer, arr)

drem-darios

import hmac
import os
import hashlib
import base64
import unittest

__author__ = 'drem'


class SecurityUtil(object):

drem-darios

class Node:
  def __init__(self, value, next=None):
    self.value = value
    self.next = next


def has_cycle(head):
  fast_pointer = head
  slow_pointer = head
  while fast_pointer is not None and fast_pointer.next is not None:

drem-darios

import java.util.*;

class Interval {
  int start;
  int end;

  public Interval(int start, int end) {
    this.start = start;
    this.end = end;
  }

drem-darios

def make_squares(arr):
  squares = [0 for x in range(len(arr))]
  frontPointer = 0
  backPointer = len(arr) - 1

  for resultIndex in range(len(arr)):
    frontSquare = arr[frontPointer] * arr[frontPointer]
    backSquare = arr[backPointer] * arr[backPointer]

    if frontSquare >= backSquare:

drem-darios

import java.awt.*;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.stream.Stream;

public class Camera {

    private Function<Color, Color> filter;

    public Camera(){