#include <iostream>
#include <algorithm>
#include <cstdio>
using namespace std;
const int MAX=110;
int arr[MAX];
int main() {
    int n;
    scanf("%d",&n);
    for(int i=0;i<n;++i) scanf("%d",&arr[i]);

    sort(arr,arr+n);
    printf("%d",arr[n-1]);
    printf("\n");
    if(n==1) {printf("-1"); return 0;}
    for(int i=0;i<n-1;++i) printf("%d ",arr[i]);
    printf("\n");
    return 0;
}