Compilare: main.cpp: In function 'int main()': main.cpp:33:19: 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 c=0;c<a.size ();c++) | ~^~~~~~~~~~ main.cpp:30:24: warning: unused variable 'mx' [-Wunused-variable] 30 | int dr[100001],m,i,mx=0,p=0; | ^~ main.cpp:30:29: warning: variable 'p' set but not used [-Wunused-but-set-variable] 30 | int dr[100001],m,i,mx=0,p=0; | ^