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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- long long a[200000],b,c,d=0,e,f,i,j,k,l;
- cin>>b;
- c=2*b;
- for(i=0;i<c;i++)
- {
- cin>>a[i];
- }
- sort(a,a+c);
- for(i=1;i<c;i++)
- {
- if(a[i]!=a[i-1])
- d++;
- }
- if(!d) cout<<-1<<endl;
- else
- {
- for(j=0;j<c;j++)
- {
- printf("%d ",a[j]);
- }
- cout<<endl;
- }
- return 0;
- }
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