Pagini recente » Cod sursa (job #941916) | Clasamentul arhivei Infoarena Monthly | Cod sursa (job #2493738) | Cod sursa (job #3289772) | Cod sursa (job #1654641)
#include <cstdio>
#include <vector>
#include <queue>
using namespace std;
const int NMAX = 50003;
const int INF = 1<<20;
class Compare
{
public:
bool operator () (int a , int b)
{
return (a>b);
}
};
bool viz[NMAX];
vector<int>G[NMAX];
vector<int>dist[NMAX];
int discovered_distance[NMAX];
priority_queue<int , vector<int> , Compare> pq;
int n,m;
void Dijk(int u)
{
int new_dist;
pq.push(u);
viz[u] = 1;
discovered_distance[u] = 0;
while(!pq.empty())
{
u = pq.top();
pq.pop();
for(size_t i=0;i<G[u].size();++i)
{
new_dist = discovered_distance[u] + dist[u][i];
if(new_dist < discovered_distance[G[u][i]])
{
discovered_distance[G[u][i]] = new_dist;
pq.push(G[u][i]);
viz[G[u][i]] = 1;
}
}
}
}
int main()
{
freopen("dijkstra.in","r",stdin);
freopen("dijkstra.out","w",stdout);
int pos1,pos2,d;
scanf("%d%d",&n,&m);
for(int i=1;i<=m;++i)
{
scanf("%d%d%d",&pos1,&pos2,&d);
G[pos1].push_back(pos2);
dist[pos1].push_back(d);
}
for(int i=1;i<=n;++i)
discovered_distance[i] = INF;
Dijk(1);
for(int i=2;i<=n;++i)
printf("%d ",discovered_distance[i] == INF ? 0 : discovered_distance[i]);
printf("\n");
return 0;
}