Pagini recente » Cod sursa (job #1103868) | Cod sursa (job #2037071) | Cod sursa (job #2098064) | Cod sursa (job #2854109) | Cod sursa (job #1275048)
#include <fstream>
#include <vector>
#include <cstring>
#include <queue>
#define inf 1061109567
#define nmax 50005
using namespace std;
int n, m;
vector< pair<int, int> > a[nmax];
int dist[nmax];
void citire()
{
freopen("dijkstra.in", "r", stdin);
scanf("%d%d", &n, &m);
int x, y, cost;
for (int i=0; i<m; ++i)
{
scanf("%d%d%d", &x, &y, &cost);
a[x].push_back(make_pair(y, cost));
}
}
void dijkstra()
{
bool use[nmax];
queue<int> q;
memset(dist, inf, sizeof(dist));
memset(use, false, sizeof(use));
dist[1]=0; q.push(1); use[1]=true;
while (!q.empty())
{
int nod=q.front();
q.pop();
use[nod]=false;
for(vector< pair<int, int> >::iterator it=a[nod].begin(); it!=a[nod].end(); ++it)
if (dist[nod] + it->second < dist[it->first])
{
dist[it->first] = dist[nod] + it->second;
if (!use[it->first]) {
q.push(it->first);
use[it->first] = true;
}
}
}
}
void afisare()
{
freopen("dijkstra.out", "w", stdout);
for(int i=2; i<=n; ++i)
printf("%d ", (dist[i]<inf?dist[i]:0));
}
int main()
{
citire();
dijkstra();
afisare();
}