Pagini recente » Cod sursa (job #2442576) | Cod sursa (job #1855018) | Cod sursa (job #2801975) | Cod sursa (job #2653477) | Cod sursa (job #1438408)
#include <iostream>
#include<fstream>
#include<queue>
#include<vector>
#define NMAX 50005
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
vector<int>G[NMAX],C[NMAX];
queue<int>Q;
int viz[NMAX];
int drum[NMAX],N,M;
void BFS(int nod)
{
nod=Q.front();
viz[nod]=0;
Q.pop();
for (unsigned int i=0;i<G[nod].size();i++)
{
if (drum[G[nod][i]]> drum[nod]+C[nod][i])
{
drum[G[nod][i]]=drum[nod]+C[nod][i];
if (viz[G[nod][i]]==0)
{
Q.push(G[nod][i]);
viz[G[nod][i]]=1;
}
}
}
}
int main()
{
f>>N>>M;
int a,b,cost;
for(int i=1;i<=M;i++)
{
f>>a>>b>>cost;
G[a].push_back(b);
C[a].push_back(cost);
}
Q.push(1);
viz[1]=1;
drum[1]=0;
for(int i=2;i<=N;i++)
drum[i]=500005;
BFS(1);
for(int i=2;i<=N;i++)
if(drum[i]!=500005)
g<<drum[i]<<" ";
else
g<<0<<" ";
return 0;
}