UVa 10055 - Hashmat the Brave Warrior

https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=94&page=show_problem&problem=996

解题思路：求两个数差值的绝对值，注意用long；

#include<iostream>
using namespace std;
 
int main()
{
   long a,b;
   while(cin>>a>>b)
       {
           if(b>a)
           cout<<b-a<<endl;
           else
           cout<<a-b<<endl;
       }
   return 0;
}