Compilare: user.cpp: In function ‘long long int countPos(int)’: user.cpp:25:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V[dig].size();i++) ^ user.cpp:36:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V[j].size();i++) ^ user.cpp:38:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(start<V[dig].size() && V[j][i]>V[dig][start]) ^ user.cpp:18:19: warning: unused variable ‘sum’ [-Wunused-variable] int counter=0,sum=0; ^