Pagini recente » Cod sursa (job #968067) | Cod sursa (job #2864480) | Cod sursa (job #2523942) | Cod sursa (job #2862124) | Cod sursa (job #3313713)
#include <bits/stdc++.h>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
int n,m,i,x,y,cost,d[50010],nod,viz[50010];
const int inf=INT_MAX;
vector <pair<int,int>>v[50010];
priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>>pq;
void read()
{
fin>>n>>m;
for(i=1;i<=m;i++)
{
fin>>x>>y>>cost;
v[x].push_back({y,cost});
}
}
void dijkstra(int k)
{
for(i=1;i<=n;i++)
d[i]=inf;
d[k]=0;
pq.push({k,0});
while(!pq.empty())
{
nod=pq.top().first;
cost=pq.top().second;
pq.pop();
if(!viz[nod])
{
viz[nod]=1;
for(auto x:v[nod])
{
if(cost+x.second<d[x.first])
{
d[x.first]=cost+x.second;
pq.push({x.first,d[x.first]});
}
}
}
}
for(i=2;i<=n;i++)
if(d[i]!=inf)fout<<d[i]<<" " ;
else fout<<"0"<<" ";
}
int main()
{
read();
dijkstra(1);
return 0;
}