Compilare: main.cpp: In function 'int main()': main.cpp:40:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(int i=0;i<s.size();++i){ | ~^~~~~~~~~ main.cpp:44:46: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | while(s[j]>='0' && s[j]<='9' && j<s.size()){ | ~^~~~~~~~~ main.cpp:78:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | for(int i=0;i<res.size();++i){ | ~^~~~~~~~~~~ main.cpp:92:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | while(res[j]!=' ' && j<res.size()){ | ~^~~~~~~~~~~ main.cpp: In function 'int operation(int, int, char)': main.cpp:33:1: warning: control reaches end of non-void function [-Wreturn-type] 33 | } | ^