#include <stdio.h>#include <string.h>
int csucsok[1000][1000];
int famagas(int facsucs){
int i,j,k=1,l=0;
i=csucsok[facsucs][1];
l=csucsok[facsucs][0];
if(l==0) {j=0;}else{j=famagas(i)+1;}
while(k<=l) {k++;
i=csucsok[facsucs][k];
if(j<famagas(i)+1) {
j=famagas(i)+1;}}
return j;}
int main(){int n,o,i,j;
FILE *be,*ki;
be=fopen("be.txt","r");
ki=fopen("ki.txt","w");
fscanf(be,"%d",&n);
for(i=1;i<=n;i++){
fscanf(be,"%d",&o);
csucsok[i][0]=o;
for(j=1;j<=o;j++){
fscanf(be,"%d",&csucsok[i][j]);}}
j=famagas(1);
fprintf(ki,"%d\n",j);









fclose(be);
fclose(ki);
return 0;
}