leolee192

import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        Reader reader = new Reader();
        Writer writer = new PrintWriter(new BufferedOutputStream(System.out));

        int N = reader.nextInt();
        for (int i=0; i<N; ++i) {
            int a = reader.nextInt(), b = reader.nextInt();

leolee192

func concatCopyPreAllocate(slices [][]byte) []byte {
    var totalLen int
    for _, s := range slices {
        totalLen += len(s)
    }
    tmp := make([]byte, totalLen)
    var i int
    for _, s := range slices {
        i += copy(tmp[i:], s)
    }

leolee192

#!/usr/bin/python

import logging
import socket
from threading import Thread


class PipeThread(Thread):
    pipes = []