Pagini recente » Cod sursa (job #1540801) | Cod sursa (job #2322270) | Cod sursa (job #2910627) | Cod sursa (job #2675542) | Cod sursa (job #2198103)
#include <fstream>
#include <vector>
#include <queue>
#define oo (1<<30)
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
const int NMax = 50005;
struct cel
{
int val;
bool incoada;
};
cel alah[NMax];
struct compara
{
bool operator()(int x, int y)
{
return alah[x].val > alah[y].val;
}
};
int n,m;
vector < pair<int,int> > v[NMax];
priority_queue<int, vector<int>, compara> coada;
void citire()
{
fin>>n>>m;
int a,b,c;
for(int i=1; i<=m; i++)
{
fin>>a>>b>>c;
v[a].push_back(make_pair(b,c));
}
for(int i=2; i<=n; i++)
{
alah[i].val=oo;
}
}
void dijsktra(int nod_curent)
{
alah[nod_curent].val=0;
coada.push(nod_curent);
alah[nod_curent].incoada=true;
while(!coada.empty())
{
int operam=coada.top();
coada.pop();
alah[operam].incoada=false;
for(size_t i=0; i<v[operam].size(); i++)
{
int vecin=v[operam][i].first;
int cost=v[operam][i].second;
if(cost+alah[operam].val<alah[vecin].val)
{
alah[vecin].val=cost+alah[operam].val;
if(alah[vecin].incoada==false)
{
alah[vecin].incoada=true;
coada.push(vecin);
}
}
}
}
}
void afisare()
{
for(int i=2; i<=n; i++)
fout<<alah[i].val<<" ";
}
int main()
{
citire();
dijsktra(1);
afisare();
return 0;
}