#include<iostream>
#include<cstdio>
#include<algorithm>
using namespace std;
int main(){
int n;
int array[1000];
while(scanf("%d\n",&n)!=EOF){
for(int i=0;i<n;++i){
scanf("%d ",&array[i]);
}
sort(array,array+n);
cout<<array[n-1]<<endl;
--n;
if(n){
for(int i=0;i<n;++i){
cout<<array[i]<<" ";
}
}
else{
cout<<-1;
}
cout<<endl;
}
return 0;
}

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