Pagini recente » Monitorul de evaluare | Cod sursa (job #1912284) | Diferente pentru problema/elimin2 intre reviziile 6 si 2 | Profil Mirceamp | Cod sursa (job #1918990)
#include <iostream>
#include <queue>
#include <fstream>
#include <vector>
#define mp make_pair
#define pb push_back
using namespace std;
const int NMax = 50005;
const int MMax = 250005;
const int inf = 0x3f3f3f3f;
int N, M;
vector < pair < int, int > > G[MMax];
priority_queue < pair < int, int > > Q;
int dist[NMax], viz[NMax];
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
void Read()
{
fin>>N>>M;
for(int i=1; i<=M; ++i)
{
int x,y,c;
fin>>x>>y>>c;
G[x].pb(mp(y,c));
}
for(int i=2; i<=N; ++i)
dist[i]=inf;
dist[1] = 0;
}
void Dijkstra()
{
Q.push(mp(0,1));
while(!Q.empty())
{
int x, c;
x = Q.top().second;
c = -Q.top().first;
Q.pop();
vector < pair < int, int > > ::iterator it;
for(it=G[x].begin(); it!=G[x].end(); ++it)
{
if(dist[it->first] > c + it->second)
{
dist[it->first] = c + it->second;
Q.push(mp(-dist[it->first],it->first));
}
}
}
for(int i=2; i<=N; ++i)
if(dist[i]!=inf)
fout<<dist[i]<<" ";
else
fout<<0<<" ";
}
int main()
{
Read();
Dijkstra();
return 0;
}