Compilare: main.cpp: In function 'int main()': main.cpp:33:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | for (int i = 0; i < num.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:60:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for (int i = 0; i < num1.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:69:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 69 | for (int i = 0; i < num2.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:98:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 98 | for (int i = 0; i < num1.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:107:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 107 | for (int i = 0; i < num2.size(); i++) | ~~^~~~~~~~~~~~~