#include<cstdio>
using namespace std;
const int SIZEN=100010,INF=0x7fffffff/2;
int ans=INF;
int N;
int A[SIZEN]={0},B[SIZEN]={0},C[SIZEN]={0};
void read()
{
	scanf("%d",&N);
	for(int i=1;i<=N;i++)
	{
		scanf("%d%d%d",&A[i],&B[i],&C[i]);
	}
}
bool check(int a,int b,int c)
{
	for(int i=1;i<=N;i++)
	{
		if(A[i]>a&&B[i]>b&&C[i]>c) return 0;
	}
	return 1;
}
void work()
{
	for(int i=0;i<=N;i++)
	{
		if(A[i]>ans) continue;
		for(int j=0;j<=N;j++)
		{
			if(A[i]+B[j]>ans) continue;
			for(int k=0;k<=N;k++)
			{
				if(A[i]+B[j]+C[k]>ans) continue;
				if(check(A[i],B[j],C[k])) ans=A[i]+B[j]+C[k];
			}
		}
	}
	printf("%d",ans);
}
int main()
{
	freopen("playwithboss.in","r",stdin);
	freopen("playwithboss.out","w",stdout);
	read();
	work();
	return 0;
}