lyuboyn.cpp: In function 'std::vector<std::vector<int> > solve(int)':
lyuboyn.cpp:20:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
20 | for(int i=0;i<aa.size();i++){
| ~^~~~~~~~~~
lyuboyn.cpp:24:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
24 | for(int i=0;i<bb.size();i++){
| ~^~~~~~~~~~
lyuboyn.cpp: In function 'int main()':
lyuboyn.cpp:51:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
51 | for(int i=0;i<ans.size();i++){
| ~^~~~~~~~~~~
lyuboyn.cpp:46:7: warning: variable 'ind' set but not used [-Wunused-but-set-variable]
46 | int ind=-1;
| ^~~
lyuboyn.cpp:97:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
97 | for(int i=1;i<ans.size();i+=2){
| ~^~~~~~~~~~~
lyuboyn.cpp:117:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
117 | if(ind==ans.size()){
| ~~~^~~~~~~~~~~~
lyuboyn.cpp:120:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
120 | if(ind2==ans2.size()){
| ~~~~^~~~~~~~~~~~~