简单题

#include 
      
       #include 
       
        using namespace std;int l, n;void input(){    int earliest, latest;    scanf("%d%d", &l, &n);    latest = 0;    earliest = 0;    for (int i = 0; i < n; i++)    {        int a;        scanf("%d", &a);        earliest = max(earliest, min(a, l - a));        latest = max(latest, max(a, l- a));    }    printf("%d %d\n", earliest, latest);}int main(){    int t;    scanf("%d", &t);    while (t--)    {        input();    }    return 0;}