Pagini recente » Cod sursa (job #2691123) | Cod sursa (job #231759) | Cod sursa (job #1893285) | Cod sursa (job #728836) | Cod sursa (job #2116441)
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
const int nmax=50000,inf=1000000000;
struct graf
{
int nod,cost;
};
struct data
{
int nod;
};
vector<graf>v[nmax+5];
int best[nmax+5];
bool operator<(data a,data b)
{
return best[a.nod]>best[b.nod];
}
priority_queue<data>q;
void DIJ(int nod)
{
for(int i=0;i<v[nod].size();i++)
{
int nod_nou=v[nod][i].nod;
if(best[nod_nou]==inf)
{
best[nod_nou]=best[nod]+v[nod][i].cost;
q.push({nod_nou});
}
}
q.pop();
if(q.empty())
return;
int x=q.top().nod;
DIJ(x);
}
int n,m;
int main()
{
fin>>n>>m;
for(int i=1;i<=m;i++)
{
int a,b,cost;
fin>>a>>b>>cost;
v[a].push_back({b,cost});
}
for(int i=1;i<=n;i++)
best[i]=inf;
best[1]=0;
q.push({1});
DIJ(1);
for(int i=2;i<=n;i++)
{
if(best[i]==inf)
fout<<"0 ";
else
fout<<best[i]<<" ";
}
return 0;
}
/**
**/