Compilare: main.cpp: In function 'bool parseNext(int&)': main.cpp:20:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | while(pos < in.size() && '0' <= in[pos] && in[pos] <= '9') | ~~~~^~~~~~~~~~~ main.cpp:26:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | if(pos >= in.size() || in[pos] == '+' || in[pos] == '-') | ~~~~^~~~~~~~~~~~ main.cpp:29:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | return pos < in.size(); | ~~~~^~~~~~~~~~~ main.cpp:55:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | return (pos < in.size()); | ~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:78:14: warning: unused variable 'sum' [-Wunused-variable] 78 | ll out = 0, sum = 0; | ^~~ main.cpp: In function 'bool parseNext(int&)': main.cpp:51:15: warning: 'index' may be used uninitialized in this function [-Wmaybe-uninitialized] 51 | coef[index] += sign; | ~~~~~~~~~~~~^~~~~~~