Compilare: main.cpp: In function 'int main()': main.cpp:23:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | while( i < s.size()){ | ~~^~~~~~~~~~ main.cpp:25:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | while( i + 2 < s.size() && s[i] > s[i + 1] && s[i + 1] < s[i + 2]){ | ~~~~~~^~~~~~~~~~ main.cpp:17:10: warning: unused variable 'c1' [-Wunused-variable] 17 | char c1, c2, c3; | ^~ main.cpp:17:14: warning: unused variable 'c2' [-Wunused-variable] 17 | char c1, c2, c3; | ^~ main.cpp:17:18: warning: unused variable 'c3' [-Wunused-variable] 17 | char c1, c2, c3; | ^~