#include using namespace std; using Int = long long; template inline void chmin(T1 &a,T2 b){if(a>b) a=b;} template inline void chmax(T1 &a,T2 b){if(a vector dijkstra(Int s,vector > > & G){ const T INF = numeric_limits::max(); using P = pair; Int n=G.size(); vector d(n,INF); vector b(n,-1); priority_queue,greater

> q; d[s]=0; q.emplace(d[s],s); while(!q.empty()){ P p=q.top();q.pop(); Int v=p.second; if(d[v]d[v]+c){ d[u]=d[v]+c; b[u]=v; q.emplace(d[u],u); } } } return d; } //INSERT ABOVE HERE const Int MAX = 2020; Int dist[MAX][MAX]; signed main(){ Int n,m,l; cin>>n>>m>>l; l--; vector t(n); for(Int i=0;i>t[i]; using P = pair; vector > G(n); for(Int i=0;i>a>>b>>c; a--;b--; G[a].emplace_back(b,c); G[b].emplace_back(a,c); } for(Int i=0;i