Pagini recente » Cod sursa (job #1569048) | Cod sursa (job #1411439) | Cod sursa (job #2227166) | Cod sursa (job #2023245) | Cod sursa (job #1648331)
#include <fstream>
#include <algorithm>
#include <vector>
#include <queue>
#define NMAX 50005
#define inf 2000000000
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
int i, n, m, d[NMAX], x, y, cost;
vector < pair < int, int > > v[NMAX];
bool visited[NMAX];
struct comp
{
bool operator () (pair < int, int > &a, pair < int, int > &b)
{
return a.second > b.second;
}
};
priority_queue < pair < int, int >, vector < pair < int, int > >, comp > pq;
void dijkstra()
{
pq.push({1, 0});
while (!pq.empty())
{
int curr = pq.top().first;
pq.pop();
if (!visited[curr])
{
visited[curr] = 1;
for (auto & it : v[curr])
if (!visited[it.first])
{
d[it.first] = min(d[it.first], d[curr] + it.second);
pq.push({it.first, d[it.first]});
}
}
}
}
int main()
{
f >> n >> m;
for (i = 1; i <= m; ++ i)
{
f >> x >> y >> cost;
v[x].push_back(make_pair(y, cost));
}
for (i = 2; i <= n; ++ i)
d[i] = inf;
dijkstra();
for (i = 2; i <= n; ++ i)
if (d[i] == inf)
g << "0 ";
else
g << d[i] << " ";
return 0;
}