Compilare: main.cpp: In function 'int main()': main.cpp:18:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for (int i = 0; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp:31:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | if (val == 0 && i < s.size() && isalpha(s[i]) && !isdigit(s[i - 1])) | ~~^~~~~~~~~~ main.cpp:35:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | if (i < s.size() && isalpha(s[i])) | ~~^~~~~~~~~~ main.cpp:81:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | while (i < a.size() && j < b.size()) | ~~^~~~~~~~~~ main.cpp:81:34: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | while (i < a.size() && j < b.size()) | ~~^~~~~~~~~~