Pagini recente » Cod sursa (job #2485913) | Cod sursa (job #3180343) | Cod sursa (job #2248237) | Cod sursa (job #1895182) | Cod sursa (job #2475291)
#include <bits/stdc++.h>
#define NMAX 50010
#define LL long long
#define oo 9999999999
#define mp make_pair
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
LL dist[NMAX];
int n, m, x, y, w;
vector<pair<LL, int> > v[NMAX]; /// (nod, distanta pe muchie pana la nod)
bitset<NMAX> in_set; ///spune daca a nodul a fost vizitat sau nu
set<pair<LL, int> > currentSet; /// (distanta pana la nod, nod)
set<pair<LL, int> >::iterator top;
int main()
{
LL dst;
int nod;
fin >> n >> m;
for(int i=1; i<=m; i++)
{
fin >> x >> y >> w;
v[x].push_back(mp(w,y));
}
for(int i=1; i<=n; i++)
dist[i] = oo;
dist[1] = 0;
currentSet.insert(mp(0, 1));
in_set[1] = 1;
while(!currentSet.empty())
{
top = currentSet.begin();
currentSet.erase(top);
in_set[top->second] = 0;
nod = top->second;
dst = top->first;
for(auto vec:v[nod])
{
if(dst + vec.first < dist[vec.second])
{
if(in_set[vec.second])
currentSet.erase(currentSet.find(mp(dist[vec.second], vec.second)));
dist[vec.second] = dst + vec.first;
currentSet.insert(mp(dist[vec.second], vec.second));
in_set[vec.second] = 1;
}
}
}
for(int i=2; i<=n; i++){
if(dist[i] != oo)
fout << dist[i] << ' ';
else
fout << 0 << ' ';
}
fout << '\n';
return 0;
}