Pagini recente » Cod sursa (job #307895) | Cod sursa (job #656944) | Cod sursa (job #2379938) | Cod sursa (job #547580) | Cod sursa (job #2480741)
#define MAX_N 50000
#define INF 0x3f3f3f3f
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
struct A
{
int nod, cost;
bool operator > (const A& other) const { return cost > other.cost; }
};
int n, m;
vector<A> G[MAX_N + 1];
vector<int> dist;
void Citire();
void Dijkstra(int nodStart, vector<int>& outDist);
int main()
{
Citire();
Dijkstra(1, dist);
for (size_t i = 2, l = dist.size(); i < l; ++i)
{
fout << dist[i] << ' ';
}
fin.close();
fout.close();
return 0;
}
void Citire()
{
fin >> n >> m;
int x, y, cost;
for (int i = 0; i < m; ++i)
{
fin >> x >> y >> cost;
G[x].push_back({ y, cost });
G[y].push_back({ x, cost });
}
}
void Dijkstra(int nodStart, vector<int>& outDist)
{
outDist = vector<int>(n + 1, INF);
priority_queue<A, vector<A>, greater<A>> Q;
outDist[nodStart] = 0;
Q.push({ nodStart, 0 });
while (!Q.empty())
{
A nod = Q.top();
Q.pop();
if (nod.cost > outDist[nod.nod]) { continue; }
for (const auto& i : G[nod.nod])
{
if (outDist[i.nod] > (i.cost + outDist[nod.nod]))
{
outDist[i.nod] = i.cost + outDist[nod.nod];
Q.push({ i.nod, outDist[i.nod] });
}
}
}
}