Problem:
A + B Problem

Compute A + B.

Input

The input will consist of a series of pairs of integers A and B separated by a space, one pair of integers per line. The input will be terminated by EOF.

Output

For each pair of input integers A and B, you must output the sum of A and B in one line.

Constraints

-1000 ≤ A, B ≤ 1000

Sample Input

1 2
10 5
100 20

Output for the Sample Input

3
15
120

Sample Program

#include<stdio.h>

int main(){
int a, b;
while( scanf("%d %d", &a, &b) != EOF ){
printf("%d\n", a + b);
}
return 0;
}

Solution in Ruby (judge verdict: Wrong Answer)

#!/usr/bin/ruby                                                                                                                                                           
# -*- coding: utf-8 -*-                                                                                                                                                   

issue = {}
issue.default = 0
n = gets.to_i
n.times {
  product = gets.split(' ')
  issue[product[0]] += product[1].to_i
}

i = issue.keys.sort {|l, r|
  if l.length < r.length
    -1
  elsif l.length == r.length
    l <=> r
  else
    1
  end
}

i.each{ |x|
  puts "#{x} #{issue[x]}"
}