Pagini recente » Cod sursa (job #2368246) | Cod sursa (job #1386590) | Cod sursa (job #1907487) | Cod sursa (job #247239) | Cod sursa (job #2884440)
#include <bits/stdc++.h>
#define ll long long
using namespace std;
ifstream fin ("dijkstra.in");
ofstream fout ("dijkstra.out");
const int N_MAX = 50005;
vector<pair<int , int>>g[N_MAX];
int n , m , d[N_MAX] , lg[N_MAX];
bool used[N_MAX];
void solve (int start){
queue<pair<int , int>>q;
for (int i=1; i<=n; i++){
d[i] = 1e9;
}
d[start] = 0;
q.push({start , 0});
while (q.empty() == false){
int node = q.front().first , costActual = q.front().second;
q.pop();
used[node] = false;
if (costActual > d[node]) continue;
for (int i=0; i<lg[node]; i++){
int new_node = g[node][i].first , new_cost = g[node][i].second;
if (d[new_node] > d[node] + new_cost){
d[new_node] = d[node] + new_cost;
if (used[new_node] == false){
q.push({new_node , d[new_node]});
used[new_node] = true;
}
}
}
}
}
int main(){
ios_base::sync_with_stdio(false);
fin >> n >> m;
for (int i=1; i<=m; i++){
int x , y , cost; fin >> x >> y >> cost;
g[x].push_back({y , cost});
}
for (int i=1; i<=n; i++){
lg[i] = (int)g[i].size();
}
solve(1);
for (int i=2; i<=n; i++){
if (d[i] == 1e9){
d[i] = 0;
}
fout << d[i] << " ";
}
}