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Cod sursa(job #508503)
#include <fstream>
#include<queue>
using namespace std;
int n,m,d[50002];
bool inqueue[50002];
const int inf = 0x3f3f3f3f;
typedef struct nod
{
int vec,pret;
nod *urm;
} *pNod;
pNod v[50002];
void add(pNod &dest, int b,int c)
{
pNod p;
p = new nod;
p -> vec = b;
p -> pret = c;
p -> urm = dest;
dest = p;
}
void citire()
{
ifstream f("dijkstra.in");
f>>n>>m;
int i,a,b,c;
for (i = 1; i <= m; i++)
{
f>>a>>b>>c;
add(v[a],b,c);
}
}
int main()
{
citire();
int x,s,i;
pNod p;
queue <int> q;
memset(d,inf,sizeof(d)); d[1]=0;
inqueue[1]=1;
q.push(1);
while(!q.empty())
{
x=q.front();
inqueue[x]=0;
q.pop();
for(p=v[x];p!=NULL;p=p->urm)
{
s=d[x]+p->pret;
if(s<d[p->vec])
{
d[p->vec]=s;
if(!inqueue[p->vec])
{
q.push(p->vec);
inqueue[p->vec]=1;
}
}
}
}
ofstream g("dijkstra.out");
for(i=2;i<=n;i++)
if(d[i]==inf) g<<0<<" ";
else g<<d[i]<<" ";
return 0;
}