Compilare: main.cpp: In function 'void solve()': main.cpp:38:19: 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] 38 | for (int i=1;i<a.size();i++) { | ~^~~~~~~~~ main.cpp:41:19: 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] 41 | for (int i=1;i<b.size();i++) { | ~^~~~~~~~~ main.cpp:45:19: 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] 45 | for (int i=1;i<=b.size()-a.size()+1;i++) { | ~^~~~~~~~~~~~~~~~~~~~~ main.cpp:57:19: 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] 57 | for (int i=1;i<=b.size()-a.size()+1;i++) { | ~^~~~~~~~~~~~~~~~~~~~~