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#include <fstream>
#include <algorithm>
using namespace std;
ifstream fin("cutii.in");
ofstream fout("cutii.out");
struct box{
long long l,c,h;
}a[7000];
long long n,i,s,maxx,max_tot,l,c,h;
bool cmp(box a, box b)
{
return ((long long)a.l * a.c < (long long)b.l * b.c);
}
int main()
{
fin>>n;
for(i=1;i<=n;i++)
{
fin>>l>>c>>h;
if(l>c)
swap(l,c);
if(l>h)
swap(l,h);
if(c>h)
swap(c,h);
a[++s].l=l;
a[s].c=c;
a[s].h=h;
a[++s].l=l;
a[s].c=h;
a[s].h=c;
a[++s].l=c;
a[s].c=h;
a[s].h=l;
}
n=s;
sort(a+1,a+n+1,cmp);
for(i=1;i<=n;i++)
{
maxx=0;
for(int j=1;j<i;j++)
if(a[i].l>a[j].l && a[i].c>a[j].c)
if(a[j].h>maxx)
maxx=a[j].h;
a[i].h+=maxx;
if(a[i].h>max_tot)
max_tot=a[i].h;
}
fout<<max_tot;
return 0;
}