#include <vector>
#include <iostream>
using namespace std;
int main () {
vector<vector<vector<int > > > vec;
for(int i = 0; i < 3; i++) {
vec.push_back(vector<vector<int > >());
for (int j = 0; j < 3; j++) {
vec[i].push_back(vector<int>());
for (int k = 0; k < 3; k++) {
vec[i][j].push_back(k);
}
}
}
for (vector<vector<vector< int > > >::iterator it = vec.begin(); it != vec.end(); it++) {
for (vector<vector< int > >::iterator jt = it->begin(); jt != it->end(); jt++) {
for (vector<int>::iterator kt = jt->begin(); kt != jt->end(); kt++) {
cout << *kt;
}
cout << "\n";
}
cout << "\n";
}
cout << endl;
return 0;
}