10055 - Hashmat the Brave Warrior

#include<iostream>
using namespace std;
int main(){
    int firstNumber = 0;
    int EndNumber = 0;
    while(cin>>firstNumber>>EndNumber){
        int temp = 0;
        if(firstNumber > EndNumber){
            temp=EndNumber;
            EndNumber=firstNumber;
            firstNumber=temp;
        }
        cout<<EndNumber-firstNumber;
    }
    return 0;
}

題目網址：http://bit.ly/2nQ1nS2