Eroare de compilare: main.cpp: In function 'void c1()': main.cpp:27:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for (int i = k; i < s.size(); ++i) | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:56:5: error: 'c2' was not declared in this scope; did you mean 'c1'? 56 | c2(); | ^~ | c1 Non zero exit status: 1