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Cod sursa(job #184361)
#include <fstream>
#include <vector>
#include <algorithm>
#include <queue>
using namespace std;
#define FILEIN "dijkstra.in"
#define FILEOUT "dijkstra.out"
const int MAXN = 50005;
const int INF = 0x3f3f3f3f;
int N, M;
vector< pair<int, int> > G[MAXN];
int Dmin[MAXN];
void ReadData() {
ifstream fin(FILEIN);
fin >> N >> M;
for (int i = 0; i < M; ++i) {
int a, b, c;
fin >> a >> b >> c;
G[a].push_back(make_pair(b, c));
}
}
void Solve() {
bool InQueue[MAXN];
queue<int> Q;
memset(Dmin, INF, sizeof(Dmin));
memset(InQueue, false, sizeof(InQueue));
for (Q.push(1), Dmin[1] = 0, InQueue[1] = true; !Q.empty(); InQueue[Q.front()] = false, Q.pop())
for (vector< pair<int, int> >::iterator it = G[Q.front()].begin(); it != G[Q.front()].end(); ++it)
if (Dmin[Q.front()] + it->second < Dmin[it->first]) {
Dmin[it->first] = Dmin[Q.front()] + it->second;
if (!InQueue[it->first]) {
Q.push(it->first);
InQueue[it->first] = true;
}
}
}
void WriteData() {
ofstream fout(FILEOUT);
for (int i = 2; i <= N; ++i)
fout << (Dmin[i] < INF ? Dmin[i] : 0) << " ";
}
int main() {
ReadData();
Solve();
WriteData();
}