Pagini recente » Cod sursa (job #2928552) | Cod sursa (job #2407942) | Cod sursa (job #2953148) | Cod sursa (job #319158) | Cod sursa (job #3192799)
#include <fstream>
#include <vector>
#include<queue>
#define NMAX 100005
#define INF 1000000002
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector<pair<int, int> > g[NMAX];
int n, p = 1, cmin[NMAX], m, x, c;
int vfmin;
int i, j;
int uz[NMAX];
class ComparVf{
public:
bool operator ()(int x, int y){
return cmin[x] > cmin[y];
}
};
priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>> > H;
void citire(){
fin >> n >> m;
int i, j, c;
pair<int, int> vf;
while(fin >> i >> j >> c){
vf.first = j; vf.second = c;
g[i].push_back(vf);
}
}
void djikstra(){
pair<int, int> pp;
pp.first = 0 ;
pp.second = p;
H.push(pp);
for(i = 1; i <= n; i++){
cmin[i] = INF;
}
cmin[p] = 0;
while(!H.empty()){
vfmin = H.top().second;
H.pop();
if(cmin[vfmin] == INF) break;
if(!uz[vfmin]){
for(i = 0; i < g[vfmin].size(); i++){
x = g[vfmin][i].first; c = g[vfmin][i].second;
if(!uz[x])
if(cmin[x] > cmin[vfmin] + c){
cmin[x] = cmin[vfmin] + c;
pp.first = cmin[x]; pp.second = x;
H.push(pp);
}
}
uz[vfmin] = 1;
}
}
}
void afisare(){
for(int i = 2; i <= n; i++){
if(cmin[i] != INF)
fout << cmin[i] << " ";
else fout << 0 << " ";
}
}
int main(){
citire();
djikstra();
afisare();
return 0;
}