#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using vl = vector<ll>;
template<class T> using vc = vector<T>;
template<class T> using vvc = vector<vector<T>>;

#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define rep(i, n) for (ll i = 0; i < (n); i++)
#define repr(i, n) for (ll i = (n)-1; i >= 0; i--)
#define repe(i, l, r) for (ll i = (l); i < (r); i++)
#define reper(i, l, r) for (ll i = (r)-1; i >= (l); i--)
#define repa(i,n) for (auto& i: n)

template<class T> inline bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T> inline bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
void init() {cin.tie(0);ios::sync_with_stdio(false);cout << fixed << setprecision(15);}

#ifdef DEBUG
template <class T, class N> void verr(const T& a, const N& n) { rep(i, n) cerr << a[i] << " "; cerr << "\n" << flush; }
ll dbgt = 1; void err() { cerr << "passed " << dbgt++ << "\n" << flush; }
template<class H, class... T> void err(H&& h,T&&... t){ cerr<< h << (sizeof...(t)?" ":"\n") << flush; if(sizeof...(t)>0) err(forward<T>(t)...); }
#endif

const ll INF = 4e18;
const ld EPS = 1e-11;
const ld PI = acos(-1.0L);
const ll MOD = 1e9 + 7;
// const ll MOD = 998244353;
//--------------------------------------------------------------------------------//

int main() {
    init();
    ll V, E, allcost = 0;
    cin >> V >> E;
    vvc<ll> dist(V, vl(V, INF));

    vl vcnt(V);

    rep(i,E){
        ll s, t, d;
        cin >> s >> t >> d;
        allcost += d;
        if (chmin(dist[s][t], d)) dist[t][s] = d;

        vcnt[s]++, vcnt[t]++;
    }

    rep(k, V) rep(i, V) rep(j, V) chmin(dist[i][j], dist[i][k] + dist[k][j]);

    vl odl;
    rep(i, V) if (vcnt[i] & 1) odl.eb(i);
    

    ll on = odl.size();
    vl dp(1 << on, INF);
    dp[0] = 0;

    rep(bit,1<<on){
        rep(u, on){
            if(1<<u & bit) continue;
            rep(v, u){
                if (1 << v & bit) continue;
                chmin(dp[bit | 1 << u | 1 << v], dp[bit] + dist[odl[u]][odl[v]]);
            }
        }
    }

    cout << allcost + dp[(1 << on) - 1] << endl;
}
