#include <bits/stdc++.h>
using namespace std;
const long long mx=21;
const long long mod=1e9+7;
typedef long long ll;
int a[mx][mx];
int dp[1<<mx];int k;int n,m;
int solve(int mask){
if (__builtin_popcount(mask) == k) return 0;
int &ret=dp[mask];
if(ret!=-1){return ret;}
ret=1<<30;
for(int i=0;i<n;i++){
if(!(mask&(1<<i))){continue;}
for(int j=0;j<n;j++){
if(i==j){continue;}
if(!(mask&(1<<j))){continue;}
ret=min(ret,solve(mask^(1<<i))+a[i][j]);
}
}
return ret;
}
int main() {
memset(dp,-1,sizeof(dp));
cin>>n>>k;
for(int i=0;i<n;i++){
for(int j=0;j<n;j++){
cin>>a[i][j];//cout<<a[i][j];
}
}
cout<<solve((1<<n)-1);
}
