Compilare: main.cpp: In function 'bool can_solve(const std::string&, int)': main.cpp:34:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for (int i = 0; i < key.size(); i++) { | ~~^~~~~~~~~~~~ main.cpp:39:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | if (poz+amt-1>=bucket[key[i]-'a'].size()) { | ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:43:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | if (i+1<key.size()) { | ~~~^~~~~~~~~~~