Pagini recente » Cod sursa (job #2826053) | Cod sursa (job #2436049) | Cod sursa (job #1963985) | Cod sursa (job #398412) | Cod sursa (job #3213645)
#include <bits/stdc++.h>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
int n, m;
int d[50005];
vector<pair<int, int>> a[50005];
priority_queue<pair<int, int>> q;
bitset<50005> viz;
void Dijk(int x)
{
for (int i = 1; i <= n; i++)
d[i] = 2e9;
d[x] = 0;
q.push({0, x});
while (!q.empty())
{
x = q.top().second;
q.pop();
if (viz[x] == 0)
for (auto e : a[x])
if (d[e.second] > d[x] + e.first)
{
d[e.second] = d[x] + e.first;
if (viz[e.second] == 0) q.push({-d[e.second], e.second});
}
viz[x] = 1;
}
}
int main()
{
int x, y, i, cost;
fin >> n >> m;
for (i = 1; i <= m; i++)
{
fin >> x >> y >> cost;
a[x].push_back({cost, y});
}
Dijk(1);
for (i = 2; i <= n; i++)
fout << d[i] << " ";
fout << "\n";
}