Compilare: main.cpp: In function 'bool cmp(std::__cxx11::string, std::__cxx11::string)': main.cpp:14:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a.size(); i ++) ~~^~~~~~~~~~ main.cpp: In function 'int f(std::__cxx11::string, std::__cxx11::string)': main.cpp:27:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a.size(); i ++) ~~^~~~~~~~~~ main.cpp:30:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = poz; j < b.size(); j ++) ~~^~~~~~~~~~ main.cpp:39:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz >= b.size()) ~~~~^~~~~~~~~~~ main.cpp:41:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i == a.size() - 1) ~~^~~~~~~~~~~~~~~