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Cod sursa(job #175661)
#include <fstream.h>
ifstream fin ("zvon.in");
ofstream fout ("zvon.out");
char a[100000][100000];
long n,lg,max,nrt,l;
void parc (int k)
{
long i;
for (i=1;i<=n;i++)
{
if (a[k][i]==l)
{
lg++;
parc (i);
lg--;
}
else
if(max<lg)
max=lg;
}
}
int main ()
{
fin>>nrt;
long i,j,k;
for (l=1;l<=nrt;l++)
{
fin>>n;
for (k=0;k<n-1;k++)
{
fin>>i>>j;
a[i][j]=l;
}
lg=1; max=0;
if (n!=1)
{ parc (1); fout<<max<<'\n'; }
else fout<<0<<'\n';
}
return 0;
}