Pagini recente » Cod sursa (job #749878) | Cod sursa (job #2376411) | Cod sursa (job #3212353) | Cod sursa (job #1511062) | Cod sursa (job #2858600)
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
int n, m;
vector < pair < int, int > > v[50005];
queue < int > q;
int best[50005];
bool inq[50005];
const int inf = 2e9;
void Dijkstra (int start)
{
q.push(start);
inq[start] = 1;
while (!q.empty())
{
int nod = q.front();
q.pop();
inq[nod]=0;
// lg = v[nod].size();
for (int i=0; i<v[nod].size(); i++)
{
int vecin = v[nod][i].first;
int cost = v[nod][i].second;
if (best[nod] + cost < best[vecin])
{
best[vecin] = best[nod] + cost;
if (!inq[vecin])
{
q.push(vecin);
inq[vecin] = 1;
}
}
}
}
}
int main()
{
f >> n >> m;
int x ,y ,c;
for(int i=1;i<=m;i++)
{
f>>x>>y>>c;
v[x].push_back(make_pair(y, c));
}
for (int i=1; i<=n; i++)
best[i] = inf;
best[1] = 0;
Dijkstra(1);
for(int i=2;i<=n;i++)
if(best[i]==inf)
g<<0<<" ";
else
g<<best[i]<<" ";
return 0;
}