Pagini recente » Cod sursa (job #791829) | Cod sursa (job #1743966) | Cod sursa (job #1144268) | Cod sursa (job #3193579) | Cod sursa (job #1118386)
#include <fstream>
#include <vector>
#include <queue>
#define nmax 50000+5
#define inf 1 << 30
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector<pair<int, int> > graf[nmax];
int pas[nmax];
int n;
struct cmp
{
bool operator()(const int & a, const int & b)
{
return pas[a] > pas[b];
}
};
priority_queue<int, vector<int>, cmp> heap;
void citire()
{
int m;
int x, y, c;
fin >> n >> m;
for (int i = 0; i < m; i++)
{
fin >> x >> y >> c;
graf[x].push_back(make_pair(y, c));
}
}
void rezolvare()
{
int curent, vecin;
int pasT;
heap.push(1);
for (int i = 2; i <= n; i++)
pas[i] = inf;
while (!heap.empty())
{
curent = heap.top();
heap.pop();
for (int i = 0; i < graf[curent].size(); i++)
{
vecin = graf[curent][i].first;
pasT = pas[curent] + graf[curent][i].second;
if (pasT < pas[vecin])
{
pas[vecin] = pasT;
heap.push(vecin);
}
}
}
}
void afisare()
{
for (int i = 2; i <= n; i++)
fout << (pas[i] != inf ? pas[i] : 0) << ' ';
fout << '\n';
}
int main()
{
citire();
rezolvare();
afisare();
return 0;
}