Pagini recente » Cod sursa (job #449708) | Cod sursa (job #1832660) | Cod sursa (job #1969656) | Cod sursa (job #2745153) | Cod sursa (job #2764899)
#include <iostream>
#include <set>
#include <fstream>
using namespace std;
ifstream fin ("dijkstra.in");
ofstream fout ("dijkstra.out");
set <pair <int,int>> g[50010];
int d[50010], f[50010];
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].insert({v, cost});
}
for(int i = 1; i <= n; ++i) d[i] = 1e9;
for(auto v : g[1])
d[v.first] = v.second;
f[1] = 1, d[1] = 0;
d[0] = 1e9;
int pmax = 1;
while(pmax != 0) {
pmax = 0;
for(int i = 1; i <= n; ++i)
if(f[i] == 0 && d[i] < d[pmax] && d[i] != 0)
pmax = i;
if(pmax != 0) {
f[pmax] = 1;
for(auto v : g[pmax])
if(f[v.first] == 0 && d[v.first] > d[pmax] + v.second)
d[v.first] = d[pmax] + v.second;
}
}
for(int i = 2; i <= n; ++i)
if(d[i] < 1e9) fout << d[i] << " ";
else fout << "0 ";
return 0;
}