Compilare: main.cpp: In function 'int main()': main.cpp:62:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | while (i < s.size()) { | ~~^~~~~~~~~~ main.cpp:77:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | while (i < s.size() && ('0' <= s[i] && s[i] <= '9') || s[i] == '-') { | ~~^~~~~~~~~~ main.cpp:77:33: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 77 | while (i < s.size() && ('0' <= s[i] && s[i] <= '9') || s[i] == '-') { | ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:82:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 82 | if (i < s.size() && s[i] == ',') { | ~~^~~~~~~~~~