Compilare: main.cpp: In function 'int main()': main.cpp:25:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (int i = start; i < cash.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:50:47: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for (int i = start; i < cash.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:59:47: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for (int i = start; i < cnt.size(); i++) | ~~^~~~~~~~~~~~