Compilare: main.cpp: In function 'int main()': main.cpp:18:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for(int i = 1; i <= s.size() - 7; i += 8){ | ~~^~~~~~~~~~~~~~~ main.cpp:22:58: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] 22 | biti++, ch += (1 << (7 - (j - (i + 1))) - 1); | ~~~~~~~~~~~~~~~~~~~~~^~~