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#!/bin/sh

# Needs imagemagick
for i in *.png; do convert "$i" -quality 90 -interpolate Nearest -filter point -resize 400% "${i%.*}.jpg"; done

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#!/bin/sh

for i in *.png; do cwebp "$i" -q 90 -o "${i%.*}.webp"; done

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# Rotate photos.
for photo in *.jpg ; do convert $photo -rotate -90 $photo ; done

# Grayscale them.
for photo in *.jpg ; do convert $photo -set colorspace Gray -separate -average $photo ; done

# Change brightness and contrast (<brightness>x<contrast>).
for photo in *.jpg ; do convert $photo -brightness-contrast 5x5 $photo ; done

# Make a pdf from photos.

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#!/bin/sh

sudo rm -rf /Applications/Adobe*
sudo rm -rf /Applications/Utilities/Adobe*
sudo rm -rf /Library/Application\ Support/Adobe
sudo rm -rf /Library/Preferences/com.adobe.*
sudo rm -rf /Library/PrivilegedHelperTools/com.adobe.*
sudo rm -rf /private/var/db/receipts/com.adobe.*
sudo rm -rf ~/Library/Application\ Support/Adobe*
sudo rm -rf ~/Library/Application\ Support/com.apple.sharedfilelist/com.apple.LSSharedFileList.ApplicationRecentDocuments/com.adobe*

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#!/bin/sh

for i in *.wav; do ffmpeg -i "$i" -codec:a libmp3lame -ar 44100 -b:a 320k "${i%.*}.mp3"; done

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#!/usr/bin/env python3

import shutil
import subprocess
import os
import sys
import sys
from pathlib import Path

INPUT_AUDIO_DIR = './audio'

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1. Install ghostscript:

sudo apt install ghostscript

2. Optimize your PDF:

gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/ebook -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf

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To initialize:

git submodule update --init --recursive

To get latest commits:

git submodule update --init --remote --recursive

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Tree Search in C++

Depth-Search First (DFS)

Recursive

void search(Node& root) {
  // 1. Visit node.
  visit(node);

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std::cond_var cond;
std::mutex mutex;
std::queue<int> queue;
auto finished = false;

std::thread producer([&cond, &mutex, &queue, &finished](){
  // Add data to the queue.
  auto steps = 100;
  while (steps) {
    std::lock_guard<std::mutex> lock{ mutex };