Compilare: main.cpp: In function 'int main()': main.cpp:64:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | if(mx<ctc[i].size()) | ~~^~~~~~~~~~~~~~ main.cpp:84:25: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 84 | while(sol.size()<mx) | ~~~~~~~~~~^~~ main.cpp:103:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 103 | if(sol.size()==mx) | ~~~~~~~~~~^~~~ main.cpp:68:10: warning: unused variable 'ok' [-Wunused-variable] 68 | bool ok=false; | ^~