51nod 1266 蚂蚁

#include <bits/stdc++.h>
using namespace std;

int main()
{
long long n,l,lef,rig,mid,i,x;
while(cin>>n>>l)
{
lef=1<<30;
rig=0;
mid=0;
for(i=1;i<=n;i++)
{
scanf("%lld",&x);
lef=min(lef,x);
rig=max(rig,x);
mid=max(mid,min(x,l-x));
}
printf("%lld %lld\n",mid,max(l-lef,rig));
}
}