#include <iostream>
#include <vector>
using namespace std;
 
int min(int a, int b){
	if(a>b)
	return b;
	return a;
}
 
 
 
int main() {
int n,m,a;
cin>>n>>m;
vector<vector<int>> adj(n);
for(int i=0; i<n; i++)
for(int j=0; j<m; j++){
	cin>>a;
	adj[i].push_back(a);
}
int cost=10000000;
int suma=0;
for(int i=0; i<n; i++){
for(int j=i+1; j<n; j++){
	suma=0;
	for(int k=0; k<m; k++){
	int h=adj[i][k];	
	int f=adj[j][k];
suma=suma+min(h,f );
 
	}
if(suma<cost)
cost=suma;
}}
cout<<cost;
	return 0;
}

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