#include <stdio.h>
#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 10000000000000000

vector<vector<long long>> c;
int N;
long long get(int A,int B,int last){
	if(A==(1<<N)-1)return 0;
	static vector dp(512,vector(512,vector(9,-1)));
	
	if(dp[A][B][last]!=-1)return dp[A][B][last];
	long long ret = Inf;
	rep(i,N){
		if((A>>i)&1)continue;
		long long temp = c[last][i];
		int nA = A|(1<<i);
		int nB = B;
		if((B>>last)&1){
		}
		else{
			nB |= 1<<last;
			nA ^= 1<<last;
		}
		ret = min(ret,temp + get(nA,nB,i));
	}
	
	dp[A][B][last] = ret;
	return ret;
}

int main(){
	
	
	cin>>N;
	
	c.resize(N,vector<long long>(N));
	rep(i,N){
		rep(j,N)cin>>c[i][j];
	}
	
	long long ans = Inf;
	
	rep(i,N){
		ans = min(ans,get(1<<i,0,i));

	}
	/*
	rep(i,1<<N){
		rep(j,1<<N){
			rep(k,N){
				cout<<get(i,j,k)<<',';
			}
			cout<<" ";
		}
		cout<<endl;
	}
	*/
	
	cout<<ans<<endl;
	
    return 0;
}