#include <bits/stdc++.h>
using namespace std;
const int MN=21;
const int inf=1e9+7;
int n,k;
int board[MN][MN];
int dp[1<<MN];
int back(int bit){
// cout<<bit<<endl;
if(__builtin_popcount(bit)==k) return 0;
if(dp[bit]>0) return dp[bit];
int ans=inf;
for(int i=1;i<=n;++i){
if(!(bit&(1<<(i-1)))) continue;
for(int j=1;j<=n;++j){
if(i==j) continue;
if(!(bit&(1<<(j-1)))) continue;
ans=min(ans,board[j][i]+back(bit-(1<<(j-1))));
ans=min(ans,board[i][j]+back(bit-(1<<(i-1))));
// cout<<ans<<endl;
}
}
return dp[bit]=ans;
}
int main(){
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
memset(dp,-1,sizeof(dp));
cin>>n>>k;
for(int i=1;i<=n;++i){
for(int j=1;j<=n;++j){
cin>>board[i][j];
}
}
cout<<back((1<<n)-1);
}
