#include <bits/stdc++.h>
using namespace std;
int v[801];
int main()
{
    int n,nr=0;
    cin>>n;
    for (int i=1; i<=n; i++)
        cin>>v[i];
    for (int i=1; i<=n-1; i++)
        for (int j=i+1; j<=n; j++)
            for (int k=j+1; k<=n; k++)
                if (v[i]+v[j]>=v[k] && v[i]+v[k]>=v[j] && v[k]+v[j]>=v[i])
                    {
                    	nr++;
                    	cout<<v[i]<<" "<<v[j]<<" "<<v[k]<<" "<<endl;
                    }
		cout<<nr;
    return 0;
}