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;
int const N=105;
double const inf=1e9+5;
vector<pair<int,int>> adj[N];
double edge[N][N];
vector<int> com[N];
int cc=0;
int rep[N];
double X[N];
double ct[N];
double val[N];
int n,m;
void cc_find(int node,int xx,int c){
ct[node]=c;
X[node]=xx;
rep[node]=cc;
com[cc].push_back(node);
for(auto i:adj[node])
if(rep[i.first]==0)
cc_find(i.first,-xx,i.second-c);
}
double answer(int c,double x){
double v=0.0;
for(int i:com[c])
for(int j:com[c])
if(edge[i][j]>0){
v=(X[i]+X[j])*x;
v+=ct[i]+ct[j];
if(v!=edge[i][j])
return inf;
}
double sm=0.0;
for(auto i:com[c])
sm+=abs((X[i]*x)+ct[i]);
return sm;
}
int main(){
cin>>n>>m;
for(int i=0;i<m;i++){
int u,v,w;
cin>>u>>v>>w;
adj[u].push_back({v,w});
adj[v].push_back({u,w});
if(edge[u][v]>0 && edge[u][v]!=w){
cout<<"NO"<<endl;
return 0;
}
edge[v][u]=w;
edge[u][v]=w;
}
for(int i=1;i<=n;i++){
if(rep[i]==0){
cc++;
cc_find(i,1.0,0.0);
}
}
double ans=0.0;
for(int c=1;c<=cc;c++){
double sm=inf;
double xx=-3;
for(double t=0;t<=200;t++){
double x=-20.0+((0.5)*t);
// cout<<x<<endl;
if(answer(c,x)<sm){
sm=answer(c,x);
xx=x;
}
}
if(sm==inf){
cout<<"NO"<<endl;
return 0;
}
for(auto i:com[c])
val[i]=(X[i]*xx)+ct[i];
}
cout<<fixed;
cout<<"YES"<<endl;
for(int i=1;i<=n;i++)
cout<<setprecision(10)<<val[i]<<' ';
cout<<endl;
// cout<<ans<<endl;
}
Compilation message (stderr)
Graph.cpp: In function 'int main()':
Graph.cpp:58:10: warning: unused variable 'ans' [-Wunused-variable]
58 | double ans=0.0;
| ^~~
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