Cod sursa(job #809254)
#include<fstream>
#include<vector>
#include<queue>
#define inf 0x3f3f3f
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
struct dij
{
int nod,cost;
};
vector<vector<dij> > a(50002);
vector<int> d(50002,inf);
queue<int> q;
int n,m,i,j,k,p1,p2,p3;
void dijkstra(int x)
{
int i;
q.push(x);
d[1]=0;
while(!q.empty())
{
x=q.front();
for(i=0;i<a[x].size();++i)
if(d[a[x][i].nod]>d[x]+a[x][i].cost)
d[a[x][i].nod]=d[x]+a[x][i].cost,q.push(a[x][i].nod);
q.pop();
}
}
int main()
{
f>>n>>m;
for(i=1;i<=m;i++)
{
f>>p1>>p2>>p3;
a[p1].push_back((dij){p2,p3});
}
dijkstra(1);
for(i=2;i<=n;i++)
if(d[i]==inf)
g<<0<<" ";
else
g<<d[i]<<" ";
return 0;
}