Pagini recente » Cod sursa (job #3366443) | Cod sursa (job #3366430) | Cod sursa (job #3366431) | Cod sursa (job #3366453) | Cod sursa (job #3366173)
#include <bits/stdc++.h>
using namespace std;
ifstream f("bellmanford.in");
ofstream g("bellmanford.out");
const int N = 50010;
const int oo = N*1001;
int n,m,cost[N],inQ[N];
vector<pair<int,int>> v[N];
queue<int> q;
int main()
{
f>>n>>m;
for(int i=1;i<=m;i++)
{
int x,y,c;
f>>x>>y>>c;
v[x].push_back(make_pair(y,c));
}
for(int i=1;i<=n;i++)
cost[i]=oo;
cost[1]=0;
q.push(1);
inQ[1]=1;
while(q.size())
{
int nod=q.front();
q.pop();
inQ[nod]=0;
int cost_nod=cost[nod];
for(auto it:v[nod])
{
int vec,cost_arc;///vec=it.first,cost_arc=it.second;
tie(vec,cost_arc)=it; /// iau elementul din lista de vecini si distribui perechea pe doua variabile
if(cost_nod+cost_arc<cost[vec])
{
cost[vec]=cost_nod+cost_arc;
if(inQ[vec]==0)
{
q.push(vec);
inQ[vec]=1;
}
}
}
}
for(int i=2;i<=n;i++)
g<<cost[i]<<' ';
g<<'\n';
return 0;
}