Pagini recente » Cod sursa (job #1860925) | Cod sursa (job #1918201) | Cod sursa (job #936398) | Cod sursa (job #3147678) | Cod sursa (job #936368)
Cod sursa(job #936368)
#include<fstream>
#include<vector>
#include<queue>
#define In "dijkstra.in"
#define Out "dijkstra.out"
#define Inf 2147483647
#define Nmax 50002
using namespace std;
struct Coord
{
int nod,cost;
bool operator <(const Coord &A) const
{
return cost>A.cost;
}
};
int sol[Nmax],n;
vector<Coord>graf[Nmax];
priority_queue<Coord>q;
inline void Citire()
{
int x,y,c,m;
ifstream fin(In);
fin>>n>>m;
Coord p;
while(m--)
{
fin>>x>>y>>c;
p.nod = y;
p.cost = c;
graf[x].push_back(p);
}
}
void Init()
{
for(int i=2;i<=n;i++)
sol[i] = Inf;
}
void Dijkstra()
{
Coord poz,vec;
poz.nod = 1;
poz.cost = 0;
q.push(poz);
vector<Coord>::iterator it;
while(!q.empty())
{
poz = q.top();
q.pop();
for(it=graf[poz.nod].begin();it!=graf[poz.nod].end();it++)
{
vec = *it;
if(sol[vec.nod]>sol[poz.nod]+vec.cost)
{
sol[vec.nod] = sol[poz.nod] + vec.cost;
q.push(vec);
}
}
}
}
inline void Afis()
{
ofstream fout(Out);
for(int i=2;i<=n;i++)
{
if(sol[i]==Inf)
fout<<"0 ";
else
fout<<sol[i]<<" ";
}
fout<<"\n";
fout.close();
}
int main()
{
Citire();
Init();
Dijkstra();
Afis();
return 0;
}