Compilare: main.cpp: In function 'bool semafor(int)': main.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<has[ind].size();i++){ ~^~~~~~~~~~~~~~~~ main.cpp: In function 'void pop(int)': main.cpp:29:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<has[ind].size();i++){ ~^~~~~~~~~~~~~~~~