Pagini recente » Cod sursa (job #5177) | Cod sursa (job #3208550) | Cod sursa (job #6606) | Cod sursa (job #2967139) | Cod sursa (job #2491741)
#include <fstream>
#include <queue>
#include <vector>
#include <bitset>
#include <limits>
using namespace std;
const int MAXN = 5e4;
ifstream cin("dijkstra.in");
ofstream cout("dijkstra.out");
struct Graph{
bitset<MAXN+1> v;
vector<int> d;
vector<pair<int, int>> e[MAXN+1];
};
Graph g;
struct comp{
bool operator () (const int& a, const int& b){
return g.d[a] > g.d[b];
}
};
priority_queue<int, vector<int>, comp> pq;
void dijkstra(){
while(!pq.empty()) {
int cur = pq.top();
pq.pop();
if (g.v.test(cur)) continue;
for (auto edge : g.e[cur]){
int son = edge.first;
int cost = edge.second;
if (g.d[son] > g.d[cur] + cost) {
pq.push(son);
g.d[son] = g.d[cur] + cost;
}
}
g.v.set(cur);
}
}
int main() {
int source = 0;
int n, m;
cin >> n >> m;
while(m --){
int u, v, cost;
cin >> u >> v >> cost;
g.e[u-1].push_back(make_pair(v-1, cost));
}
unsigned int maxx = 1 << 30;
for(int i = 1; i <= n; ++i)
g.d.push_back(maxx);
g.d[source] = 0;
pq.push(source);
dijkstra();
for (int i = 1; i < n; ++i) {
(g.d[i] == maxx) ? (cout << 0) : (cout << g.d[i]);
cout <<" ";
}
return 0;
}