Compilare: main.cpp: In function 'void bck(int&, int&, std::vector<std::vector<int> >&, std::bitset<101>&, std::vector<int>&)': main.cpp:11:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 11 | if(ans.size()==n)return ; | ~~~~~~~~~~^~~ main.cpp:17:26: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 17 | if(ans.size()==n)return ; | ~~~~~~~~~~^~~ main.cpp: In function 'int main()': main.cpp:35:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 35 | if(ans.size()==n)break; | ~~~~~~~~~~^~~ main.cpp:40:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(i=0; i<ans.size(); ++i)gout<<ans[i]<<' '; | ~^~~~~~~~~~~