[ZJa012][UVA10055] Hashmat the Brave Warrior

題目：
http://zerojudge.tw/ShowProblem?problemid=a012
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#include<stdio.h>
int main()
{
long long int a,b,z;
while(scanf("%lld%lld",&a,&b)!=EOF)
{
z=b-a;
if(z<0)
z=-z;
printf("%lld\n",z);
}
return 0;
}