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Cod sursa(job #986498)
#include <cstdio>
#include <vector>
#include <queue>
#include <bitset>
#define c first
#define f second
using namespace std;
typedef pair <int, int> nod;
const int NMAX = 50003, INFI = 2e9;
vector <nod> G[NMAX];
bitset <NMAX> viz;
int best[NMAX];
vector <nod> :: iterator j;
struct comp {
bool operator ()(const nod &a, const nod &b) {
return a > b;
}
};
priority_queue <nod, vector <nod>, comp> q;
int main () {
freopen ("dijkstra.in", "r", stdin);
freopen ("dijkstra.out", "w", stdout);
int N, M, i, a, b, c, k;
scanf ("%d%d", &N, &M);
for (i = 2; i <= N; ++i)
best[i] = INFI;
for (i = 1; i <= M; ++i)
scanf ("%d%d%d", &a, &b, &c),
G[a].push_back (make_pair (c, b));
q.push (make_pair (0, 1));
while (!q.empty ()) {
k = q.top ().f;
q.pop ();
for (j = G[k].begin (); j != G[k].end (); ++j)
if (!viz [j->f] && best[j->f] > best[k] + j->c)
best[j->f] = best[k] + j->c,
q.push (make_pair (best[j->f], j->f));
viz[k] = 1;
}
for (i = 2; i <= N; ++i)
printf ("%d ", best[i] == INFI ? 0 : best[i]);
}