vector<vector<int>> res;

vector<int> resTmp;

// sort(nums.begin(), nums.end());

while(nums.size() != 0) {

resTmp.clear();

for(auto it = nums.begin(); it != nums.end(); ) {

if(resTmp.size() == 0 || find(resTmp.begin(), resTmp.end(), *it) == resTmp.end()) {

resTmp.push_back(*it);

nums.erase(it);

} else {

it++;

}

}

for(auto it : resTmp) {

cout << it << " ";

}

cout << endl;

res.push_back(resTmp);

}

return res;

}