#include <fstream>
#include <vector>
using namespace std;
ifstream fin("hamilton.in");
ofstream fout("hamilton.out");
const int Inf = 100000000;
using VI = vector<int>;
using VVI = vector<VI>;
int n, m, cmin = Inf, x, y, cost;
VVI w;
VVI G;
VVI c;
int main()
{
	fin >> n >> m;
	G = VVI(n);
	w = VVI(n, VI(n, Inf));
	for (int i = 1; i <= m; ++i)
	{
		fin >> x >> y >> cost;
		G[x].push_back(y);
		w[x][y] = cost;
	}
	for (int nod = 0; nod < n; ++nod)
    {
        c = VVI(1 << n, VI(n, Inf));
        c[1][nod] = 0;
        for (int i = 0; i < (1 << n); ++i)
            for (int j = 0; j < n; ++j)
                if (i & (1 << j))
                    for (int k = 0; k < n; ++k)
                        if (!(i & (1 << k)))
                            c[i | (1 << k)][k] = min(c[i | (1 << k)][k], c[i][j] + w[j][k]);
        for (int j = 0; j < n; ++j)
            if (j != nod)
                cmin = min(cmin, c[(1 << n) - 1][j] + w[j][nod]);
    }
	fout << cmin;
    fin.close();
    fout.close();
    return 0;
}