Pagini recente » Cod sursa (job #2892227) | Cod sursa (job #1515690) | Cod sursa (job #145955) | Cod sursa (job #2396924) | Cod sursa (job #2505767)
#include <iostream>
#include <fstream>
#include <queue>
#include <vector>
#include <climits>
using namespace std;
vector <pair <int,int> > dr[50005];
std::queue<int> q;
int n,m,len[50005],ok[50005];
ifstream f("bellmanford.in");
ofstream g("bellmanford.out");
int main()
{
f>>n>>m;
for(int i=1; i<=m; i++)
{
int x,y,z;
f>>x>>y>>z;
dr[x].push_back({y,z});
}
q.push(1);
for(int i=2; i<=n; i++)
len[i]=INT_MAX;
int i;
for(i=1; i<=n+1&&!q.empty(); i++)
{
int vr=q.size();
for(int pk=1;pk<=vr;pk++)
{int k=q.front();
q.pop();
ok[k]=0;
for(auto &v:dr[k])
{
int x,y;
x=v.first;
y=v.second;
if(len[x]>len[k]+y)
{
len[x]=len[k]+y;
if(!ok[x])
{
ok[x]++;
q.push(x);
}
}
}
}
}
if(i==n+2)
g<<"Ciclu negativ!";
else
for(int i=2; i<=n; i++)
g<<len[i]<<' ';
return 0;
}