вроде ошибок не замечаю
package com.javarush.task.task18.task1818;
/*
Два в одном
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
FileOutputStream outputStream = new FileOutputStream(reader.readLine());
FileInputStream inputStream1 = new FileInputStream(reader.readLine());
FileInputStream inputStream2 = new FileInputStream(reader.readLine());
while (inputStream1.available() > 0 && inputStream2.available() > 0) {
int data1 = inputStream1.read();
int data2 = inputStream2.read();
outputStream.write(data1);
outputStream.write(data2);
}
outputStream.close();
inputStream1.close();
inputStream2.close();
}
}