#include <bits/stdc++.h>
using namespace std;
int n,k,a[25][25],s,ans;
bool kt[25];
void Try(int i)
{
if (s>ans) return;
if (i==k)
{
ans=min(s,ans);
return;
}
for (int l=1;l<=n;l++)
if (kt[l])
for (int j=1;j<=n;j++)
if (l!=j && kt[j])
{
kt[l]=false;
s+=a[l][j];
Try(i-1);
s-=a[l][j];
kt[l]=true;
}
}
int main()
{
//freopen("kronican.inp","r",stdin);
//freopen("kronican.out","w",stdout);
ios_base::sync_with_stdio(0);
cin.tie(0);
cin>>n>>k;
for (int i=1;i<=n;i++)
for (int j=1;j<=n;j++) cin>>a[i][j];
memset(kt,true,sizeof(kt));
s=0;ans=1e9;
Try(n);
cout<<ans;
return 0;
}
