import java.util.Scanner;

public class Main {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

while (in.hasNextInt()) {//注意while处理多个case int a = in.nextInt();

int b = in.nextInt();

System.out.println(a + b);

}

}

}

Python

import sys

try:

while True:

line = sys.stdin.readline().strip()

if line == '':

break

lines = line.split()

print int(lines[0]) + int(lines[1])

except:

pass

Python3

import sys

for line in sys.stdin:

a = line.split()

print(int(a[0]) + int(a[1]))

while(line=readline()){

var lines = line.split(' ');

var a = parseInt(lines[0]);

var b = parseInt(lines[1]);