Compilare: main.cpp: In function 'int main()': main.cpp:46:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(int i = 1; i < gray.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:56:18: warning: unused variable 'b1' [-Wunused-variable] 56 | bool b1 = get_bit(c[j - 1], poz), b2 = get_bit(c[j - 1], comp[j][poz]), changed = 0; | ^~