題目:http://acm.hdu.edu.cn/showproblem.php?pid=1000
import java.io.*;
import java.util.*;
public class Main{
public static void main(String[] args){
Scanner cin = new Scanner(System.in);
while(cin.hasNextInt()){
int a=cin.nextInt(),b=cin.nextInt();
System.out.println(a+b);
}
}
}