Compilare: main.cpp: In function 'int cuplaj(int)': main.cpp:12:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp:21:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'void cover(int)': main.cpp:32:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A[nod].size();i++){ ~^~~~~~~~~~~~~~