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#include <iostream>
#include <vector>
#include <algorithm>
#include <limits>
#include <numeric>
#include <cstring>
#include <string>
#include <queue>
#include <set>
#include <fstream>
#define pb push_back
#define mp make_pair
#define INF numeric_limits<int>::max()
#define bit(x) (-x)&x
#define int64 long long
using namespace std;
ifstream in("hamilton.in");
ofstream out("hamilton.out");
int d[19][19],dp[1<<19][19],n;
int solve(int start)
{
for(int k=0;k<(1<<n);k++)
for(int i=0;i<n;i++)
dp[k][i]=INF;
for(int i=0;i<n;i++)
if(i!=start)
dp[1<<i][i]=d[start][i];
for(int k=0;k<(1<<n);k++)
for(int i=0;i<n;i++)
if(dp[k][i]!=INF)
{
for(int t=0;t<n;t++)
if((k&(1<<t))==0 && d[i][t])
dp[k|(1<<t)][t]=min(dp[k][i]+d[i][t],dp[k|(1<<t)][t]);
}
return dp[(1<<n)-1][start];
}
int main()
{
int m;
in>>n>>m;
for(;m;m--)
{
int x,y,z;
in>>x>>y>>z;
d[x][y]=z;
}
for(int i=0;i<n;i++)
if(solve(i)!=INF)
{
out<<solve(i)<<'\n';
break;
}
return 0;
}