hdu-2673-shǎ崽 OrOrOrOrz(水题)

注意输出格式

 #include <iostream>
 #include <algorithm>
 using namespace std;
 int arr[+];
 int main() {
     int n;
     while (cin>>n) {
         for (int i=; i<n; i++) cin>>arr[i];
         sort(arr, arr+n);
         cout<<arr[n-];
         for (int i=; i*<n-; i++) {
             if (n-i- == i){
                 cout<<" "<<arr[i];
                 continue;
             }
             cout<<" "<<arr[i]<<" "<<arr[n-i-];
         }
         cout<<endl;
     }
     return ;
 }