Pagini recente » Cod sursa (job #2035002) | Cod sursa (job #2528246) | Cod sursa (job #1548530) | Cod sursa (job #2143847) | Cod sursa (job #2797075)
#include <fstream>
#include <queue>
using namespace std;
priority_queue <pair<int, int> > q;
vector <int> v[50005],co[50005];
int best[50005],f[50005];
int main()
{
ifstream cin("dijkstra.in");
ofstream cout("dijkstra.out");
int n,m,c,a,b,h=1;
pair <int ,int> pa,ca;
cin>>n>>m;
for(int i=0;i<m;i++)
{
cin>>a>>b>>c;
v[a].push_back(b);
co[a].push_back(c);
}
for(int i=0;i<50005;i++)
{
best[i]=1;
}
pa.first=0;
pa.second=1;
best[1]=0;
q.push(pa);
while(!q.empty())
{
pa=q.top();
q.pop();
if(f[pa.second]==0)
{
for(int i=0;i<v[pa.second].size();i++)
{
ca.first=co[pa.second][i]*(-1)+best[pa.second];
ca.second=v[pa.second][i];
if(best[ca.second]==1)
{
best[ca.second]=ca.first;
q.push(ca);
}
else if(ca.first>best[ca.second])
{
best[ca.second]=ca.first;
q.push(ca);
}
}
f[pa.second]=1;
}
}
for(int i=2;i<=n;i++)
{
cout<<best[i]*(-1)<<" ";
}
return 0;
}