This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef tuple<double,int,int,int> informacoes;
typedef tuple<int,int,int> trinca;
const int MAXN = 2010;
const double EPS = 1e-6;
vector<trinca> grafo[MAXN];
int N,M,processado[MAXN];
long long resposta[MAXN];
void dfs(int v){
if(processado[v]) return;
processado[v] = 1;
for(trinca aresta : grafo[v]){
dfs(get<0>(aresta));
}
}
ll Dijkstra(int alvo,double alpha,int minimiza_b){
memset(processado,0,sizeof(processado));
priority_queue<informacoes, vector<informacoes>, greater<informacoes> > pq;
pq.push({0.0,0,0,1});
while(!pq.empty()){
informacoes davez = pq.top();
pq.pop();
double dist = get<0>(davez);
int c1 = get<1>(davez),c2 = get<2>(davez),v = get<3>(davez);
if(processado[v]) continue;
processado[v] = 1;
if(v == alvo){
//if(alvo == 3) printf("D %.3lf A %.3lf %d %d\n",dist,alpha,c1,c2);
return 1LL*c1*c2;
}
for(trinca aresta : grafo[v]){
int u = get<0>(aresta),l1 = get<1>(aresta),l2 = get<2>(aresta);
if(minimiza_b) swap(l1,l2);
if(!processado[u]) pq.push({dist + (alpha)*l1 + (1.0 - alpha)*l2,c1 + l1,c2 + l2, u});
}
}
return -1;
}
ll checa(int alvo,double alpha){
return min(Dijkstra(alvo,alpha,0),Dijkstra(alvo,1.0 - alpha,1));
}
int main(){
cin >> N >> M;
for(int i = 1;i<=M;i++){
int u,v,w1,w2;
cin >> u >> v >> w1 >> w2;
grafo[u].push_back({v,w1,w2});
grafo[v].push_back({u,w1,w2});
}
dfs(1);
for(int i = 1;i<=N;i++){
if(!processado[i]) resposta[i] = -1;
}
for(int i = 2;i<=N;i++){
if(resposta[i] == -1){
cout << resposta[i] << endl;
continue;
}
long long ans = 1e18;
double ini = 0.0,fim = 1.0;
while(fim - ini > EPS){
double m1 = ini + (fim - ini)/3.0;
double m2 = fim - (fim - ini)/3.0;
ll f1 = checa(i,m1);
ll f2 = checa(i,m2);
ans = min(ans, min(f1,f2) );
if(f1 < f2){
fim = m2 - EPS;
}
else{
ini = m1 + EPS;
}
}
cout << ans << endl;
}
return 0;
}
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