Compilare: main.cpp: In function 'int main()': main.cpp:27:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for (int i = start; i < cash.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:52:47: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (int i = start; i < cash.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:61:47: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for (int i = start; i < cnt.size(); i++) | ~~^~~~~~~~~~~~