Compilare: main.cpp: In function 'int main()': main.cpp:16:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for (int c=0;c<=a.size ();c++) | ~^~~~~~~~~~~ main.cpp:21:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for (int j=c;j<=a.size();j++) | ~^~~~~~~~~~ main.cpp:13:25: warning: unused variable 'mx' [-Wunused-variable] 13 | int cnt[100001],m,i,mx=0,p=0; | ^~