Compilare: user.cpp: In function ‘int main()’: user.cpp:69:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(sir[j] >= '0' && sir[j] <= '9' && j < sir.size()) ^ user.cpp:78:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(sir[j] >= '0' && sir[j] <= '9' && j < sir.size()) ^ user.cpp:108:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < v[nod].size();j++) ^ user.cpp:61:9: warning: unused variable ‘gradMaxim’ [-Wunused-variable] int gradMaxim = 0; ^