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Cod sursa(job #669477)
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
const char iname[] = "dijkstra.in";
const char oname[] = "dijkstra.out";
ifstream fin(iname);
ofstream fout(oname);
int d[50005];
struct cmp
{
bool operator()(int &x, int &y)const
{
if(d[x] > d[y])
return 0;
return 1;
}
};
priority_queue<int, vector<int>, cmp> Q;
vector< pair <int, int> > gr[50005];
int n, m, i, c, x, y;
void init()
{
for(int i = 1; i <= n; i ++)
d[i] = 29102011;
}
void dijkstra()
{
int vf;
d[1] = 0;
Q.push(1);
while(!Q.empty())
{
vf = Q.top();
Q.pop();
for(vector<pair <int, int> >::iterator it = gr[vf].begin(); it != gr[vf].end(); ++ it)
{
if(d[it->first] > it -> second + d[vf])
{
d[it->first] = it -> second + d[vf];
Q.push(it -> first);
}
}
}
}
int main()
{
fin >> n >> m;
for(i = 1; i <= m; i ++)
{
fin >> x >> y >> c;
gr[x].push_back(make_pair(y, c));
}
init();
dijkstra();
for(i = 1; i <= n; i ++)
if(d[i] == 29102011)
d[i] = 0;
for(i = 2; i <= n; i ++)
fout << d[i] << " ";
return 0;
}