Cod sursa(job #2671071)
Utilizator | Visan Traian-Dimitrie TraianV | Data | 11 noiembrie 2020 13:44:16 |
---|---|---|---|
Problema | Sate | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.64 kb |
#include<fstream>
using namespace std;
ifstream f("sate.in");
ofstream g("sate.out");
struct{
int a,b,d;
}v[100025];
int n,m,x,y,viz[30003];
int main()
{
f>>n>>m>>x>>y;
viz[x]=1;
for(int i=1;i<=m;i++)
f>>v[i].a>>v[i].b>>v[i].d;
while(!viz[y])
{
for(int i=1;i<=m;i++)
{
if(viz[v[i].a] && !viz[v[i].b] )
viz[v[i].b] = viz[v[i].a] + v[i].d;
else
if(!viz[v[i].a] && viz[v[i].b])
viz[v[i].a] = viz[v[i].b] - v[i].d;
}
}
g<<viz[y]-1<<"\n";
f.close();
g.close();
return 0;
}