Compilare: main.cpp: In function 'int main()': main.cpp:52:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | if (found == s2.size()) | ~~~~~~^~~~~~~~~~~~ main.cpp:77:17: warning: unused variable 'last' [-Wunused-variable] 77 | int last; | ^~~~ main.cpp:49:18: warning: 'found' may be used uninitialized in this function [-Wmaybe-uninitialized] 49 | found++; | ~~~~~^~