#include <bits/stdc++.h>
#define ff first
#define ss second
#define endl '\n'
using namespace std;
const long long INF = (long long) 1e18;
const int mod = (int) 1e9+7;
const int MAXN = (int) 3e5+5;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
ll n, k;
int c[25][25];
ll dp[(1<<21) + 10];
int main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);cout.tie(nullptr);
#ifdef Local
freopen("../IO/int.txt","r",stdin);
freopen("../IO/out.txt","w",stdout);
#endif
cin>>n>>k;
for(int i = 0; i < n; i++){
for(int j = 0; j < n; j++){
cin>>c[i][j];
}
}
int mx = (1<<n);
ll ans = INF;
for(int i = 1; i < mx; i++) dp[i] = INF;
for(int i = 0; i < mx; i++){
int mask = i;
for(int j = 0; j < n; j++){
if((1<<j) & mask) continue;
for(int k = 0; k < n; k++){
if(j == k) continue;
if(((1<<k) & mask)) continue;
dp[mask | (1<<j)] = min(dp[mask | (1<<j)], dp[mask] + c[j][k]);
}
}
if(__builtin_popcount(i) >= n - k){
ans = min(ans, dp[i]);
}
}
cout<<ans<<endl;
#ifdef Local
cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
#endif
}
