Pagini recente » Cod sursa (job #2087914) | Cod sursa (job #1424596) | Cod sursa (job #2497769) | Cod sursa (job #2746857) | Cod sursa (job #2486503)
#include <bits/stdc++.h>
using namespace std;
const int N=50000;
ifstream in("bellmanford.in");
ofstream out("bellmanford.out");
priority_queue <pair<long long,int>> coada;
vector <pair<int,int>> v[N+1];
bool incoada[N+1];
long long drum[N+1];
int main()
{
int n,m,y,x,i,c;
in>>n>>m;
for(i=1; i<=m; i++)
{
in>>x>>y>>c;
v[x].push_back({y,c});
}
for(i=2; i<=n; i++)
drum[i]=(1LL<<45);
incoada[1]=true;
coada.push({0LL,1});
while(!coada.empty())
{
x=coada.top().second;
incoada[x]=false;
coada.pop();
for(i=0; i<v[x].size(); i++)
{
y=v[x][i].first;
c=v[x][i].second;
if(drum[y]>drum[x]+c)
{
drum[y]=drum[x]+c;
if(incoada[y]==false)
{
incoada[y]=true;
coada.push({-drum[y],y});
}
}
}
}
for(i=2; i<=n; i++)
if(drum[i]==(1LL<<45))
out<<"0 ";
else
out<<drum[i]<<" ";
return 0;
}