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Cod sursa(job #398449)
#include<stdio.h>
#include<vector>
#include<queue>
#include<string.h>
using namespace std;
#define NMAX 50001
#define INF 50000100
int z[NMAX],qq,d[NMAX],b,c,in,sf,i,j,n,m,k,l,a,s;
vector<int> x[NMAX], y[NMAX];
queue<int> q;
char ss[32];
int main()
{
freopen("bellmanford.in","r",stdin);
freopen("bellmanford.out","w",stdout);
// scanf("%d%d",&n,&m);
scanf("%d%d%c",&n,&m,&c);
for (i=1;i<=m;i++)
{
fgets(ss,32,stdin);
l=strlen(ss)-1;
a=b=c=j=0;
while (ss[j]!=' ')
a=a*10+ss[j++]-48;
j++;
while (ss[j]!=' ')
b=b*10+ss[j++]-48;
j++;
qq=0;
while (j<l)
{
if (ss[j]=='-')
{
qq=1;
j++;
}
c=c*10+ss[j++]-48;
}
if (qq)
c=0-c;
// scanf("%d%d%d",&a,&b,&c);
x[a].push_back(c);
y[a].push_back(b);
}
q.push(1);
for (i=2;i<=n;i++)
d[i]=INF;
z[1] = 1;
while (!q.empty())
{
int nod = q.front(); q.pop();
for (i=0;i<(int)y[nod].size();i++)
if (d[nod]+x[nod][i]<d[y[nod][i]])
{
d[y[nod][i]]=d[nod]+x[nod][i];
if (!z[y[nod][i]])
{
q.push(y[nod][i]);
z[y[nod][i]]=1;
}
}
z[nod]=0;
}
for (int nod=1;nod<=n;nod++)
for (i=0;i<(int)y[nod].size();i++)
if (d[nod]+x[nod][i]<d[y[nod][i]])
{
printf("Ciclu negativ!");
return 0;
}
for (i=2;i<=n;i++)
if (d[i]!=INF)
printf("%d ",d[i]);
else{
printf("0 ");
d[i] = 0;
}
printf("\n");
/*fclose(stdin);
fclose(stdout);
freopen("ccp.txt", "rt", stdin);
freopen("kkt.out", "w",stdout);
int www[100000], vf;
for (i = 2; i <= n; i ++){
scanf("%d", &vf);
if (vf != d[i])
printf("%d %d %d\n", i, vf, d[i]);
}
*/
return 0;
}