Pagini recente » Cod sursa (job #1340227) | Cod sursa (job #1166512) | Cod sursa (job #1209507) | Cod sursa (job #1362870) | Cod sursa (job #3238602)
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
int n, m;
vector < vector <pair <int, int> > > a;
vector <long long> cost;
vector <bool> viz;
priority_queue < pair <long long, int>, vector <pair<long long, int> >, greater <pair <long long, int> > > q;
void dijkstra()
{
cost[1] = 0;
q.push({0, 1});
while (!q.empty()) {
int nod = q.top().second;
long long val = q.top().first;
q.pop();
if (viz[nod]) {
continue;
}
viz[nod] = 1;
for (auto vecin : a[nod]) {
if (val + vecin.second < cost[vecin.first]) {
cost[vecin.first] = val + vecin.second;
q.push({cost[vecin.first], vecin.first});
}
}
}
for (int i = 2; i <= n; ++i) {
if (cost[i] == (1LL << 60)) {
cost[i] = 0;
}
}
}
int main()
{
f >> n >> m;
a.resize(n + 5), viz.resize(n + 5), cost.resize(n + 5, (1LL << 60));
for (int i = 1; i <= m; ++i) {
int x, y, z;
f >> x >> y >> z;
a[x].push_back({y, z});
a[y].push_back({x, z});
}
dijkstra();
for (int i = 2; i <= n; ++i) {
g << cost[i] << ' ';
}
return 0;
}