Compilare: main.cpp: In function 'int main()': main.cpp:14:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for (int i = 0; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp:29:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | if(val==0 && i<s.size() && isalpha(s[i]) && !isdigit(s[i-1])) | ~^~~~~~~~~ main.cpp:33:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | if(i<s.size() && isalpha(s[i])) | ~^~~~~~~~~ main.cpp:78:16: 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] 78 | while(i<a.size() && j<b.size()) | ~^~~~~~~~~ main.cpp:78:30: 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] 78 | while(i<a.size() && j<b.size()) | ~^~~~~~~~~