Compilare: main.cpp: In function 'int main()': main.cpp:81:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for (i = 2; i < a.size(); i++) | ~~^~~~~~~~~~ main.cpp:90:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 90 | for (i = 1; i < b.size(); i++) | ~~^~~~~~~~~~ main.cpp:93:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 93 | if (ax == a.size()) | ~~~^~~~~~~~~~~ main.cpp:100:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 100 | for (i = 1; i < b.size(); i++) | ~~^~~~~~~~~~ main.cpp:101:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | if (pozitie[i] == a.size() - 1) | ~~~~~~~~~~~^~~~~~~~~~~~~~~