POJ 1852 Ants

/* ***********************************************
Author        :guanjun
Created Time  :2016/10/29 19:34:19
File Name     :poj1852.cpp
************************************************ */
#include <iostream>
#include <stdio.h>
#include <algorithm>
#define ull unsigned long long
#define ll long long
#define mod 90001
#define INF 0x3f3f3f3f
#define maxn 10010
#define cle(a) memset(a,0,sizeof(a))

using namespace std;

int n,l;
int a[1001000];
int main()
{
    #ifndef ONLINE_JUDGE
    freopen("in.txt","r",stdin);
    #endif
    //freopen("out.txt","w",stdout);
    int t;
    cin>>t;
    while(t--){
        scanf("%d %d",&l,&n);
        for(int i=1;i<=n;i++)scanf("%d",&a[i]);
        int Max=0;
        int Min=0;
        for(int i=1;i<=n;i++){
            Min=max(Min,min(a[i],l-a[i]));
            Max=max(Max,max(a[i],l-a[i]));
        }
        cout<<Min<<" "<<Max<<endl;
    }
    return 0;
}