Pagini recente » Cod sursa (job #945645) | Cod sursa (job #943386) | Cod sursa (job #1278385) | Cod sursa (job #414032) | Cod sursa (job #2152220)
#include <fstream>
#include <vector>
#include <memory.h>
#include <queue>
#define inf 0x3f3f3f3f
#define MAXN 50005
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
int cost[MAXN], N, M;
struct str{
int node, c;
bool operator < (const str& other) const {
return c > other.c;
}
};
vector <str> graph[MAXN];
priority_queue <str> Q;
inline void Read() {
int x, y, z;
fin >> N >> M;
for (int i = 1; i <= M; i++) {
fin >> x >> y >> z;
graph[x].push_back({y, z});
}
}
inline void Dijkstra(int nod) {
int z, cc;
memset(cost, inf, sizeof(cost));
Q.push({nod, 0});
cost[nod] = 0;
while (!Q.empty()) {
z = Q.top().node;
cc = Q.top().c;
Q.pop();
if (cost[z] != cc)
continue;
for (auto x : graph[z]) {
if (cost[x.node] > cost[z] + x.c) {
cost[x.node] = cost[z] + x.c;
Q.push({x.node, cost[x.node]});
}
}
}
}
int main () {
Read();
Dijkstra(1);
for (int i = 2; i <= N; i++) {
if (cost[i] == inf)
cost[i] = 0;
fout << cost[i] << " ";
}
fin.close(); fout.close(); return 0;
}