Compilare: main.cpp: In function 'void bfs(long long int)': main.cpp:21:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int i=0;i<v[x].size();i++) | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:44:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for(int i=0;i<s.size();i++) | ~^~~~~~~~~ main.cpp:52:17: warning: unused variable 'caca' [-Wunused-variable] 52 | int caca=lit[s[i]-'a'][lit[s[i]-'a'].size()-2]; | ^~~~ main.cpp:59:13: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | if(i<s.size()-1) | ~^~~~~~~~~~~