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Cod sursa(job #696051)
#include<fstream>
#include<vector>
#include<queue>
using namespace std;
#define INF 0x3f3f3f3f
int n, m;
vector< pair<int, int> > a[250001];
queue<int> Q;
bool s[250001];
int d[250001];
void Read();
void Dijkstra();
void Write();
int main()
{
Read();
Dijkstra();
Write();
return 0;
}
void Read()
{
ifstream fin("dijkstra.in");
fin >> n >> m;
int x, y, z;
for(int i = 1; i <= m; ++i)
{
fin >> x >> y >> z;
a[x].push_back(make_pair(y, z));
}
fin.close();
}
void Dijkstra()
{
for(int i = 2; i <= n; ++i)
d[i] = INF;
Q.push(1);
while(!Q.empty())
{
int x = Q.front();
for(int i = 0; i < (int)a[x].size(); ++i)
{
int nod = a[x][i].first;
int cost = a[x][i].second;
if( d[nod] > d[x] + cost)
{
d[nod] = d[x] + cost;
Q.push(nod);
}
}
Q.pop();
}
}
void Write()
{
ofstream fout("dijkstra.out");
for(int i = 2; i <= n; ++i)
if( d[i] != INF )
fout << d[i] << " ";
else
fout << 0 << " ";
fout.close();
}