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  1. #include<bits/stdc++.h>
  2. #define MOD 1000000007
  3. #define ll long long
  4. using namespace std;
  5.  
  6. int main()
  7. {
  8.     std::ios_base::sync_with_stdio(0);
  9.     cin.tie(0);
  10.     int t;
  11.     cin >> t;
  12.     while (t--)
  13.     {
  14.         int n;
  15.         cin >> n;
  16.         int a[n];
  17.         for (int i=0; i<n; ++i) cin >> a[i];
  18.         sort(a, a+n);
  19.         int b[n], pos=0;
  20.         for (int i=0; i<n; i+=2) b[i]=a[pos++];
  21.         for (int i=1; i<n; i+=2) b[i]=a[pos++];
  22.         for (int i=0; i<n; ++i) cout << b[i] << " ";
  23.         cout << "\n";
  24.     }
  25. }
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin
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2
4
1 2 2 1
3
1 3 2
stdout
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1 2 1 2 
1 3 2
https://ideone.com/xDri1j
language:
C++14 (gcc 8.3)
created:
19 days ago
visibility:
public

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