Pagini recente » Cod sursa (job #1666323) | Cod sursa (job #360035) | Cod sursa (job #2523487) | Cod sursa (job #2677123) | Cod sursa (job #1691665)
#include <fstream>
#include<iostream>
#include <vector>
#include <queue>
#include <algorithm>
#define N 50013
using namespace std;
struct imp {int nod,val;};
int n,m;
fstream f,g;
vector <pair <int ,int > > v[N];
int sol[N];
class cmp
{
public:
bool operator () (imp a, imp b)
{
return a.val>b.val;
}
};
void dijkstra (int start)
{
int i, nodc, costc,nr,l,nod;
imp w,r;
r.nod=start;
r.val=0;
//priority_queue <imp,vector<imp>, cmp > q;
queue <imp> q;
q.push(r);
while (!q.empty())
{
w=q.front();
nod=w.nod;
q.pop();
for (i=0;i<v[nod].size();i++)
{
nodc=v[nod][i].first;
costc=v[nod][i].second;
if (sol[nodc]==0 || sol[nodc]>sol[nod]+costc)
{
sol[nodc]=sol[nod]+costc;
r.nod=nodc;
r.val=sol[nodc];
q.push(r);
}
}
}
}
int main()
{
f.open("dijkstra.in",ios::in);
g.open("dijkstra.out",ios::out);
f>>n>>m;
int i,x,y,z;
for (i=1;i<=m;i++)
{
f>>x>>y>>z;
v[x].push_back(make_pair(y,z));
//v[y].push_back(make_pair(x,z));
}
dijkstra(1);
for (i=2;i<=n;i++)
g<<sol[i]<<" ";
}