Compilare: main.cpp: In function 'bool Hash_check(int)': main.cpp:14:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Hash[mod].size();++i) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void Hash_del(int)': main.cpp:29:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Hash[mod].size();++i) ~^~~~~~~~~~~~~~~~~