lyuboyn.cpp: In function 'std::vector<std::vector<int> > solve(int)':
lyuboyn.cpp:18:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
18 | for(int i=0;i<aa.size();i++){
| ~^~~~~~~~~~
lyuboyn.cpp:22:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
22 | for(int i=0;i<bb.size();i++){
| ~^~~~~~~~~~
lyuboyn.cpp: In function 'int main()':
lyuboyn.cpp:41:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
41 | for(int i=0;i<ans.size();i++){
| ~^~~~~~~~~~~
lyuboyn.cpp:53:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
53 | for(int jj=ind;jj<ans.size();jj++){
| ~~^~~~~~~~~~~