Compilare: main.cpp: In function 'void baga_in_hash(int)': main.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[rest].size();i++)if(val==v[rest][i])return; ~^~~~~~~~~~~~~~~ main.cpp: In function 'bool verifica_in_hash(int)': main.cpp:21:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[rest].size();i++)if(val==v[rest][i]){v[rest].erase(v[rest].begin()+i);return 1;} ~^~~~~~~~~~~~~~~