Compilare: user.cpp: In function ‘void find_maximal_ascending_chain(int)’: user.cpp:58:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(work_vector.size()-1>total_maximum) ^ user.cpp:39:9: warning: unused variable ‘maximum’ [-Wunused-variable] int maximum=0; ^ user.cpp: In function ‘int main()’: user.cpp:104:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();i++) ^ user.cpp:116:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<binar_array.size()-k;i++) ^ user.cpp:134:77: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(position_vector[position_vector.size()-1]!=binar_array.size()-1) ^ user.cpp:147:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<position_vector.size()-1;i++) ^