Compilare: main.cpp: In function 'bool imperecheaza(int)': main.cpp:20:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<vecini[x].size(); i++) ~^~~~~~~~~~~~~~~~~ main.cpp:30:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<vecini[x].size(); i++) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void acoperire(int)': main.cpp:48:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<vecini[x].size(); i++) ~^~~~~~~~~~~~~~~~~