Pagini recente » Cod sursa (job #2834253) | Cod sursa (job #1203919) | Cod sursa (job #1874618) | Cod sursa (job #2136327) | Cod sursa (job #3273728)
#include <fstream>
#include <algorithm>
#include <vector>
#include <queue>
#define inf 9223372036854775807
#define int long long
using namespace std;
ifstream in("dijkstra.in");
ofstream out("dijkstra.out");
struct vecin
{
int nod, cost;
};
vector <vecin> a[50001];
int N, M;
queue <int> q;
int inqueue[50001]; // ==0 nu este in coada
long long d[50001];
int cnt[50001];
void bellman(int x)
{
q.push(x);
d[x] = 0;
inqueue[x] = 1;
while(!q.empty())
{
int vf = q.front();
q.pop();
inqueue[vf] = 0;
// vecinii lui vf
int k = a[vf].size();
// a[vf][0].....a[vf][k-1]
for(int i = 0; i < k; i++)
{
if( d[ a[vf][i].nod ] > a[vf][i].cost + d[vf])
{
d[ a[vf][i].nod ] = a[vf][i].cost + d[vf];
if(inqueue[ a[vf][i].nod ] == 0)
{
q.push(a[vf][i].nod);
cnt[a[vf][i].nod]++;
inqueue[a[vf][i].nod ] = 1;
}
}
}
}
}
signed main()
{
in >> N >> M;
for (int i = 1; i <= M; i++)
{
int x, y, c;
in >> x >> y >> c;
a[x].push_back({y, c});
}
for(int i = 1; i <= N ; i++)
{
d[i] = inf;
}
for(int i = 1; i <= N ; i++)
{
inqueue[i] = 0;
}
for(int i = 1; i <= N ; i++)
{
cnt[i] = 0;
}
bellman(1);
for(int i = 2; i <= N ; i++)
{
out<<d[i]<<' ';
}
return 0;
}