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import java.io.*;

public class BigDataTest {

public static void main(String[] args) throws IOException {

File sourceFile = new File("train.dat");

FileWriter fileWriter = new FileWriter(sourceFile, true);

PrintWriter pw = new PrintWriter(fileWriter);

for (int i = 2; i <= 7000000; ++i) {

if (i == 2) pw.print("\n");

pw.println("3 qid:" + i + " 1:1 2:1 3:0 4:0.2 5:0");

for (int j = 1; j <= 9; ++j) {

pw.println("1 qid:" + i + " 1:2 2:3 3:1 4:0.1 5:1");

}

pw.flush();

fileWriter.flush();

pw.close();

fileWriter.close();

}