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Cod sursa(job #781013)
#include <fstream>
#include <iostream>
#include <set>
#include <vector>
#define MAXN 50100
#define INF 1000000000
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
int n , m , d[MAXN];
vector<int> g[MAXN],c[MAXN];
set < pair <int,int > > t;
void dijkstra()
{
int i , val , x;
for(i=2 ; i<=n; i++) d[i]=INF;
t.insert(make_pair(0,1));
while(t.size()>0)
{
val=(*t.begin()).first;
x=(*t.begin()).second;
t.erase(*t.begin());
for(i=0;i<g[x].size(); i++)
if(d[g[x][i]] > val + c[x][i])
{
d[g[x][i]]=val+c[x][i];
t.insert(make_pair(d[g[x][i]],g[x][i]));
}
}
}
int main()
{
int i , a ,b , cost;
fin>>n>>m;
for(i=1; i<=m; i++)
{
fin>>a>>b>>cost;
g[a].push_back(b);
c[a].push_back(cost);
}
dijkstra();
for(i=2; i<=n; i++)
if(d[i]==INF) fout<<"0"<<" ";
else fout<<d[i]<<" ";
}