Pagini recente » Cod sursa (job #3195893) | Cod sursa (job #1998676) | Cod sursa (job #2330140) | Cod sursa (job #308420) | Cod sursa (job #2637949)
#include <iostream>
#include <fstream>
#include <vector>
#include <set>
#include <cstring>
#include <iterator>
using namespace std;
const int nMax = 50005;
const int drumMax = 0x3f3f3f3f;
int n, m;
vector <pair<int,int>> muchii[nMax];
int drum[nMax];
set <pair<bool, int>> coada;
void calculare(){
int vecin, drumLaVecin;
while(!coada.empty()){
int nod = coada.begin()->second;
coada.erase(coada.begin());
//cout << nod << "\n";
for(unsigned int i = 0; i < muchii[nod].size(); ++i){
vecin = muchii[nod][i].first;
drumLaVecin = muchii[nod][i].second + drum[nod];
//cout << drumLaVecin << " " << drum[vecin] <<"\n";
if(drumLaVecin < drum[vecin]){
if(drum[vecin] != drumMax)
coada.erase(coada.find(make_pair(0, vecin)));
drum[vecin] = drumLaVecin;
coada.insert(make_pair(0 ,vecin));
}
}
// cout << "\n";
}
}
int main(){
//ifstream fin("taxe2.in");
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
fin >> n >> m;
for(int i = 1; i <= m; ++i){
int a, b, lg;
fin >> a >> b >> lg;
muchii[a].push_back(make_pair(b, lg));
}
memset(drum, drumMax, sizeof drum); //umplu sirul de sumMax
drum[1] = 0;
coada.insert(make_pair(0,1));
calculare();
for(int i = 2; i <= n; ++i){
if(drum[i] == drumMax)
fout << 0 << " ";
else
fout << drum[i] << " ";
}
return 0;
}