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Cod sursa(job #902886)
#include <cstdio>
#include <cstring>
#include <cassert>
#include <fstream>
#include <algorithm>
#include <vector>
#include <string>
#include <queue>
#include <map>
#define c first
#define v second
using namespace std;
typedef long long LL;
typedef pair<int, int> Node;
typedef vector<Node>::iterator it;
const int oo = 0x3f3f3f3f;
const int MAX_N = 50005;
vector<Node> G[MAX_N];
int N, Distance[MAX_N];
priority_queue< Node, vector<Node>, greater<Node> > Heap;
void InitDijkstra(int Source) {
memset(Distance, oo, sizeof(Distance));
Heap.push(Node(0, Source));
}
void Dijkstra(int Source) {
InitDijkstra(Source);
while (!Heap.empty()) {
Node X = Heap.top(); Heap.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)
Heap.push(Node(X.c + Y->c, Y->v));
}
}
void Solve() {
Dijkstra(1);
}
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(Node(C, Y));
}
in.close();
}
void Print() {
ofstream out("dijkstra.out");
for (int i = 2; i <= N; ++i) {
if (Distance[i] == oo)
Distance[i] = 0;
out << Distance[i] << " ";
}
out << "\n";
out.close();
}
int main() {
Read();
Solve();
Print();
return 0;
}