Compilare: main.cpp: In function 'void add_number(int, int)': main.cpp:18:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < H[bucket].size(); ++i) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void delete_number(int, int)': main.cpp:34:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < H[bucket].size(); ++i) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int check(int, int)': main.cpp:47:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < H[bucket].size(); ++i) ~~^~~~~~~~~~~~~~~~~~