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Cod sursa(job #884726)
#include <cstring>
#include <fstream>
#include <algorithm>
#include <vector>
#include <queue>
#define c first
#define v second
using namespace std;
typedef pair<int, int> Node;
typedef vector<Node>::iterator it;
const int MAX_N = 50005;
const int oo = 0x3f3f3f3f;
vector<Node> G[MAX_N];
int N, Distance[MAX_N];
priority_queue< Node, vector<Node>, greater<Node> > H;
void InitDijkstra(int Source) {
memset(Distance, oo, sizeof(Distance));
H.push(Node(0, Source));
}
void Dijkstra(int Source) {
InitDijkstra(Source);
while (!H.empty()) {
Node X = H.top(); H.pop();
if (Distance[X.v] != oo)
continue;
Distance[X.v] = X.c;
for (it Y = G[X.v].begin(); Y != G[X.v].end(); ++Y)
if (Distance[Y->v] == oo)
H.push(Node(X.c + Y->c, Y->v));
}
}
void Read() {
ifstream in("dijkstra.in");
int M; in >> N >> M;
for (; M > 0; --M) {
int X, Y, C; in >> X >> Y >> C;
G[X].push_back(make_pair(C, Y));
}
in.close();
}
void Print() {
ofstream out("dijkstra.out");
for (int X = 1; X <= N; ++X)
if (Distance[X] == oo)
Distance[X] = 0;
for (int X = 2; X <= N; ++X)
out << Distance[X] << " ";
out << "\n";
out.close();
}
int main() {
Read();
Dijkstra(1);
Print();
return 0;
}