vishwakarma

import sys
# Include the Dropbox SDK
import dropbox
from dropbox.files import DeletedMetadata

def solve(entries, client, store, corrupted_file_extension):
	for i in entries:
        	if i.name.endswith('swp'):
            		continue
        	if isinstance(i,DeletedMetadata):

vishwakarma

import java.io.*;
import java.util.StringTokenizer;

public class TaskA {
    private static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);

vishwakarma

(venv) [gopi2667@ip-172-31-60-179 my_project]$ pip install pydoop
Collecting pydoop
  Using cached pydoop-1.2.0.tar.gz
Requirement already satisfied: setuptools>=3.3 in ./venv/lib/python2.7/site-packages (from pydoop)
Requirement already satisfied: six>=1.6.0 in ./venv/lib/python2.7/site-packages (from setuptools>=3.3->pydoop)
Requirement already satisfied: appdirs>=1.4.0 in ./venv/lib/python2.7/site-packages (from setuptools>=3.3->pydoop)
Requirement already satisfied: packaging>=16.8 in ./venv/lib/python2.7/site-packages (from setuptools>=3.3->pydoop)
Requirement already satisfied: pyparsing in ./venv/lib/python2.7/site-packages (from packaging>=16.8->setuptools>=3.3->pydoop)
Building wheels for collected packages: pydoop
  Running setup.py bdist_wheel for pydoop ... error

vishwakarma

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

vishwakarma

class Solution {
    public List<String> removeInvalidParentheses(String s) {
        List<String> result = new ArrayList<>();

        int maxLen = -1;
        Set<String> visited = new HashSet<>();
        Queue<String> queue = new LinkedList<>();
        queue.add(s);
        visited.add(s);
        while (!queue.isEmpty()) {

vishwakarma

0 -> [1,2]
2 -> [3,4]
									(currentNode, currentPath, paths)

0, "", []
	-> {1,2}
		-> (1, 0, [])
			-> XXXXXX paths = [01]
		-> (2, 0, [01])
			-> {3,4}

vishwakarma

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

vishwakarma

(<_InactiveRpcError of RPC that terminated with:
	status = StatusCode.PERMISSION_DENIED
	details = "The caller does not have permission"
	debug_error_string = "{"created":"@1595520430.751834000","description":"Error received from peer ipv6:[2a00:1450:400e:80c::200a]:443","file":"src/core/lib/surface/call.cc","file_line":1055,"grpc_message":"The caller does not have permission","grpc_status":7}"
>, <_InactiveRpcError of RPC that terminated with:
	status = StatusCode.PERMISSION_DENIED
	details = "The caller does not have permission"
	debug_error_string = "{"created":"@1595520430.751834000","description":"Error received from peer ipv6:[2a00:1450:400e:80c::200a]:443","file":"src/core/lib/surface/call.cc","file_line":1055,"grpc_message":"The caller does not have permission","grpc_status":7}"
>, errors {
  error_code {

vishwakarma

class Solution {
    public void findSecretWord(String[] wordlist, Master master) {
        Random random = new Random();
        for (int i = 0; i < 10; i++) {
            int idx = random.nextInt(wordlist.length);
            String word = wordlist[idx];
            int guess = master.guess(word);
            if (guess == 6) {
                break;
            }