pwxcoo

#include <iostream>
#include <string>
#include <queue>
#include <unordered_map>
using namespace std;

// A Tree node
struct Node
{
	char ch;

pwxcoo

#include <cstdio>
#include <cstring>
#include <iostream>
#include <stdexcept>

using namespace std;

class Fraction {
    int numerator;
    int denominator;

pwxcoo

package com.pwxcoo.github.utils;

import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.InvalidKeySpecException;
import java.util.Arrays;
import java.util.Base64;
import java.util.Random;

pwxcoo

栈和局部变量操作 
将常量压入栈的指令 
aconst_null 将null对象引用压入栈 
iconst_m1 将int类型常量-1压入栈 
iconst_0 将int类型常量0压入栈 
iconst_1 将int类型常量1压入栈 
iconst_2 将int类型常量2压入栈 
iconst_3 将int类型常量3压入栈 
iconst_4 将int类型常量4压入栈 
iconst_5 将int类型常量5压入栈 

pwxcoo

def check(frame, p):
  n = len(p) - 1
  fcs = frame[0: n]
  for i in range(n, len(frame)):
    fcs += frame[i]
    fcs = bin(int(fcs, 2))[2:]
    if (len(fcs) < len(p)): 
      continue
    fcs = bin(int(fcs, 2) ^ int(p, 2))[2:]
  while len(fcs) < n:

pwxcoo

# http://joonro.github.io/blog/posts/powershell-customizations.html
Import-Module PSReadLine
# Oh-My-Posh https://github.com/pecigonzalo/Oh-My-Posh
Import-Module "Oh-My-Posh" -DisableNameChecking -NoClobber

Set-PSReadLineOption -HistoryNoDuplicates
Set-PSReadLineOption -HistorySearchCursorMovesToEnd
Set-PSReadLineOption -HistorySaveStyle SaveIncrementally
Set-PSReadLineOption -MaximumHistoryCount 4000
# history substring search

pwxcoo

# https://askubuntu.com/questions/970988/two-finger-scrolling-not-working-for-ubuntu-17-10

sudo modprobe -r psmouse
sudo modprobe psmouse

pwxcoo

/**
 * Time: O(n)
 * Space: O(1)
 * 1. find list if exists cycle.
 * 2. 0 -> a(cycle s) -> b(cycle met) -> c(cycle s(e))
 *    slow = a + b + (b + c)n1, fast = a + b + (b + c)n2.
 *    slow * 2 = fast
 *    2a + 2b + 2*n1*(b + c) = a + b + n2*(b + c)  => a = (n2 - 2*n1) * (b + c) - b
 *    After meeting, so one start going from head and meanwhile slow start going, they will meet at cycle begin.
 **/

pwxcoo

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicInteger;

public class AtomicIntegerExample {

    private AtomicInteger sycValue = new AtomicInteger(0);

    private static final int MAX_SYC_VALUE = 3 * 10;

pwxcoo

rm -rf ~/.cache/ibus/libpinyin
ibus restart