#include #define ft first #define sc second #define lb lower_bound #define ub upper_bound #define pb push_back #define pt(sth) cout << sth << "\n" #define chmax(a, b) {if(ab) a=b;} #define moC(a, s, b) (a)=((a)s(b)+MOD)%MOD using namespace std; typedef long long ll; typedef pair P; typedef map Map; static const ll INF=1e18; static const ll MAX=1e5+7; static const ll MOD=1e9+7; ll max(ll a, ll b) {return a>b ? a:b;} ll min(ll a, ll b) {return at=t; this->c=c; } }; class A { public: ll d, id, f; A(ll d, ll id, ll f) { this->d=d; this->id=id; this->f=f; } bool operator < (const A &a) const { return d g[MAX]; ll d[MAX][2]; void dijkstra(ll s) { ll u, i; ll clr[MAX][2]={}; for(i=0; i q; d[s][0]=0; d[s][1]=0; q.push(A(0, s, 0)); while(q.size()) { A f=q.top(); q.pop(); ll u=f.id; if(f.f==0) { if(d[u][0]==-f.d) { clr[u][0]=1; for(i=0; id[u][0]+e.c) { d[e.t][0]=d[u][0]+e.c; q.push(A(-d[e.t][0], e.t, 0)); } if(clr[e.t][1]==0 && d[e.t][1]>d[u][0]) { d[e.t][1]=d[u][0]; q.push(A(-d[e.t][1], e.t, 1)); } } } }else { if(d[u][1]==-f.d) { clr[u][1]=1; for(i=0; id[u][1]+e.c) { d[e.t][1]=d[u][1]+e.c; q.push(A(-d[e.t][1], e.t, 1)); } } } } } } int main(void) { ll i, j; cin >> N >> M; for(i=0; i> a >> b >> c; a--; b--; g[a].pb(Edge(b, c)); g[b].pb(Edge(a, c)); } dijkstra(0); for(i=0; i