Pagini recente » Cod sursa (job #420790) | Monitorul de evaluare | Cod sursa (job #610583) | Cod sursa (job #2986505) | Cod sursa (job #2505862)
#include <fstream>
#include <vector>
#include <set>
using namespace std;
ifstream f("dijkstra.in");
ofstream g("dijkstra.out");
struct nod{
int y;
int cost;
bool operator<(const nod& other) const {
if(cost!=other.cost)
return cost<other.cost;
return y<other.y;
}
};
const int NMAX = 50005;
const int INF = 0x3f3f3f3f;
vector <nod> graph[NMAX];
set<nod> Q;
int dmin[NMAX];
int n, m, x, y, c;
void solve(){
for(int i=2; i<=n; i++)
dmin[i]=INF;
Q.insert({1,0});
while(!Q.empty()){
int x=Q.begin() -> y;
Q.erase(Q.begin());
for(auto &v:graph[x]){
if(dmin[v.y] > dmin[x]+v.cost){
if(dmin[v.y] != INF)
Q.erase({v.y, dmin[v.y]});
dmin[v.y]=dmin[x]+v.cost;
Q.insert({v.y, dmin[v.y]});
}
}
}
for(int i=2; i<=n; i++)
if(dmin[i]==INF)
g<<"0 ";
else
g<<dmin[i]<<" ";
}
int main()
{
f>>n>>m;
for(int i=1; i<=m; i++){
f>>x>>y>>c;
graph[x].push_back({y, c});
}
solve();
return 0;
}