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Cod sursa(job #794679)
#include <vector>
#include <fstream>
#include <queue>
using namespace std;
#define INFILE "dijkstra.in"
#define OUTFILE "dijkstra.out"
#define pb push_back
#define pii pair<int,int>
#define NMAX 50010
#define inf 50000000
vector< vector< pii > > e(NMAX);
int n, m, dist[NMAX];
priority_queue<pii, vector<pii >, greater<pii > > q;
void dijkstra(int start) {
for(int i=0; i<n; i++)
dist[i] = inf;
q.push(make_pair(0, start));
while( !q.empty() )
{
pii nod = q.top();
q.pop();
// first = cost, second = vecin
if( dist[nod.second]<inf ) continue;
dist[nod.second] = nod.first;
for(vector<pii >::iterator it=e[nod.second].begin(); it!=e[nod.second].end(); it++)
if( dist[ it->second ]==inf )
q.push(make_pair(it->first + nod.first, it->second));
}
}
int main() {
//freopen(INFILE, "r", stdin);
//freopen(OUTFILE, "w", stdout);
ifstream fin(INFILE);
ofstream fout(OUTFILE);
//scanf("%d %d ", &n, &m);
fin >> n >> m;
for(int i=0; i<m; i++) {
int a, b, c;
//scanf("%d %d %d", &a, &b, &c);
fin >> a >> b >> c;
e[a-1].pb(make_pair(c, b-1));
}
dijkstra(0);
for(int i=1; i<n; i++)
//printf("%d ", (dist[i]==inf ? 0 : dist[i]));
fout << (dist[i]==inf ? 0 : dist[i]) << " ";
return 0;
}