Pagini recente » Cod sursa (job #2557701) | Cod sursa (job #1398344) | Cod sursa (job #2596778) | Cod sursa (job #521461) | Cod sursa (job #2789298)
#include <iostream>
#include <fstream>
#include <vector>
#include <set>
#define mp make_pair
using namespace std;
ifstream fin ("dijkstra.in");
ofstream fout ("dijkstra.out");
const int maxN = 5e4 + 5;
const int INF = 1e9;
vector <pair <int , int > > g[maxN];
int dist[maxN];
int main() {
int n, m; fin >> n >> m;
for(int i = 1; i <= m; ++i) {
int u, v, cost;
fin >> u >> v >> cost;
g[u].push_back(mp(v, cost));
}
for(int i = 1; i <= n; ++i)
dist[i] = INF;
dist[1] = 0;
set <pair<int,int> > d;
d.insert(mp(0, 1));
while(! d.empty()) {
int node = d.begin()-> second;
d.erase(d.begin());
for(auto v : g[node]) {
int nod = v.first;
int cost = v.second;
if(dist[nod] > dist[node] + cost) {
// relaxam distanta de la "node" la "nod"
if(dist[nod] != INF)
d.erase(d.find(mp(dist[nod], nod)));
dist[nod] = dist[node] + cost;
d.insert(mp(dist[nod], nod));
}
}
}
for(int i = 2; i <= n; ++i)
if(dist[i] == INF) fout << "0 ";
else fout << dist[i] << " ";
return 0;
}