Compilare: main.cpp: In function 'bool verificare(std::string)': main.cpp:24:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for (int i = 1; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp:46:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for (int i = 0; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:83:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | for (i = i; i < x.size(); i++) | ~~^~~~~~~~~~ main.cpp:102:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 102 | for (i = i; i < x.size(); i++) | ~~^~~~~~~~~~ main.cpp:111:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 111 | for (i = i; i < y.size(); i++) | ~~^~~~~~~~~~ main.cpp:134:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 134 | for (i = i; i < x.size(); i++) | ~~^~~~~~~~~~ main.cpp:143:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 143 | for (i = i; i < y.size(); i++) | ~~^~~~~~~~~~