Pagini recente » Cod sursa (job #1546664) | Cod sursa (job #2069469) | Cod sursa (job #2171899) | Cod sursa (job #524140) | Cod sursa (job #1465203)
#include <fstream>
#include <vector>
#include <queue>
#include <bitset>
#include <cstdlib>
using namespace std;
ifstream fin("bellmanford.in");
ofstream fout("bellmanford.out");
#define MaxN 50001
#define INF 0x3f3f3f3f
vector<pair<int,int> > G[MaxN];
vector<int> d(MaxN), cntinQ(MaxN);
bitset<MaxN> inQueue;
queue<int> Q;
int n, m;
int x,y,z;
void Read();
void Bf();
int main()
{
Read();
Bf();
fin.close();
fout.close();
return 0;
}
void Bf()
{
for ( int i = 2; i <= n; ++i )
d[i] = INF;
d[1] = 0;
Q.push(1);
inQueue[1] = 1;
while ( !Q.empty() )
{
int nod = Q.front();
Q.pop();
inQueue[nod] = 0;
for ( auto p : G[nod] )
{
if ( d[p.first] > d[nod] + p.second )
{
d[p.first] = d[nod] + p.second;
if ( !inQueue[p.first])
{
cntinQ[p.first]++;
if ( cntinQ[p.first] == n )
{
fout << "Ciclu negativ!";
exit(0);
}
Q.push(p.first);
inQueue[p.first] = 1;
}
}
}
}
for ( int i = 2; i <= n; ++i )
fout << d[i] << ' ';
}
void Read()
{
fin >> n >> m;
for ( int i = 1; i <= m; ++i )
{
fin >> x >> y >> z;
G[x].push_back({y,z});
}
}