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55 | /// Raihan Ruhin (username: raihanruhin)
/// Resume: https://raihanruhin.github.io
#include<bits/stdc++.h>
using namespace std;
#define SET(a) memset(a,-1,sizeof(a))
#define CLR(a) memset(a,0,sizeof(a))
#define PI acos(-1.0)
#define MOD 1000000007
#define MX 100010
int main()
{
ios_base::sync_with_stdio(0), cin.tie(0);
int tc, kk=1, n, x;
cin>>tc;
while(tc--)
{
cin>>n;
int zero=0, one=0, two=0;
for(int i=0;i<n;i++)
{
cin>>x;
if(!x) zero++;
else if(x==1) one++;
else two++;
}
for(int i=0;i<n;i++)
{
if(i) cout<<" ";
if(zero)
{
cout<<0;
zero--;
}
else if(one)
{
cout<<1;
one--;
}
else
{
cout<<2;
two--;
}
}
cout<<endl;
//cout<<"Case "<<kk++<<": "<< <<"\n";
}
return 0;
}
|
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