Pagini recente » Cod sursa (job #1752523) | Cod sursa (job #433405) | Cod sursa (job #2592205) | Cod sursa (job #2344422) | Cod sursa (job #2365034)
#include <iostream>
#include <fstream>
#include <queue>
#include <vector>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector < pair <int,int> >A[100001];
priority_queue < pair <int,int> > Q;
int n,m;
int DIST[100001];
bool VIZ[100001];
int main()
{
fin>>n>>m;
for(int i=1;i<=m;i++)
{
int a,b,c;
fin>>a>>b>>c;
A[a].push_back({-c,b});
}
for(int i=2;i<=n;i++)
DIST[i]=1000000001;
Q.push({0,1});
while(!Q.empty())
{
int cnod=Q.top().first;
int nod=Q.top().second;
//// if(DIST[nod]!=cnod)
//// continue;
Q.pop();
if(!VIZ[nod])
for(auto it:A[nod])
{
//if(VIZ[it.second]==0)
if(DIST[nod]-it.first<DIST[it.second])
{
//VIZ[it.second]=1;
DIST[it.second]=DIST[nod]-it.first;
Q.push({it.first,it.second});
}
}
VIZ[nod]=1;
}
for(int i=2;i<=n;i++)
{
if(DIST[i]==1000000001)
{
fout<<0<<" ";
}
else
fout<<DIST[i]<<" ";
}
return 0;
}