Pagini recente » Cod sursa (job #2194837) | Cod sursa (job #2847624) | Cod sursa (job #2627725) | Cod sursa (job #2941796) | Cod sursa (job #3032947)
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pi;
#define pb push_back
#define mp make_pair
#define f first
#define s second
struct Node {
int nr, dist;
struct Node *next;
};
int n, m, parent[50001], dist[50001];
Node *lda[50001];
Node *r, *p, *v;
void add_edge(Node *&y, int x, int d){
r = new Node;
r->nr = x;
r->dist = d;
r->next = y;
y = r;
}
void Dijkstra(int x){
dist[x] = 0;
parent[x] = -1;
set<pair<int, int>> s;
s.insert({0, x});
while(!s.empty()){
int a = s.begin()->second;
s.erase(s.begin());
for(Node *h = lda[a]; h != NULL; h = h->next){
int b = h->nr, d = h->dist;
if(dist[a] + d < dist[b]){
s.erase({dist[b], b});
dist[b] = dist[a] + d;
s.insert({dist[b], b});
parent[b] = a;
}
}
}
}
void solve(){
cin >> n >> m;
for(int i = 0; i < m; i++){
int a, b, d;
cin >> a >> b >> d;
add_edge(lda[a], b, d);
//add_edge(lda[b], a, d); //daca graful este neorientat
}
for(int i = 0; i <= 50000; i++)
dist[i] = 1e9;
Dijkstra(1);
for(int i = 2; i <= n; i++)
cout << (dist[i] == 1e9 ? 0 : dist[i]) << ' ';
}
int main(){
freopen("dijkstra.in", "r", stdin);
freopen("dijkstra.out", "w", stdout);
ios::sync_with_stdio(0); cin.tie(0);
int t = 1;
//cin >> t;
while(t--){
solve();
}
}