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Cod sursa(job #653708)
#include<stdio.h>
#include<vector>
#include<queue>
#define inf 0x3f3f3f;
#define max 50001
using namespace std;
struct dij
{
int nod,cost;
};
vector<dij> a[max];
vector<int> d(max,inf);
queue<int> q;
int i,j,p1,p2,p3,n,m;
int dijkstra(int x)
{
int i;
q.push(x);
d[1]=0;
while(!q.empty())
{
x=q.front();
for(i=0;i<a[x].size();++i)
if(d[a[x][i].nod]>d[x]+a[x][i].cost)
d[a[x][i].nod]=d[x]+a[x][i].cost,q.push(a[x][i].nod);
else
if(d[a[x][i].nod]>0&&d[x]<0)
return 0;
q.pop();
}
return 1;
}
int main()
{
freopen("bellmanford.in","r",stdin);
freopen("bellmanford.out","w",stdout);
scanf("%d %d" ,&n,&m);
for (i=1;i<=m;i++)
{
scanf("%d%d%d" ,&p1,&p2,&p3);
a[p1].push_back((dij){p2,p3});
}
for(i=1;i<=n;i++)
d[i]=inf;
if(!dijkstra(1))
printf("Ciclu negativ!");
else
for (i=2;i<=n;i++)
if(d[i]==inf)
printf("%d\n" 0);
else
printf("%d\n" d[i]);
return 0;
}