Compilare: main.cpp: In function 'bint operator+(bint, bint)': main.cpp:20:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'const long unsigned int' [-Wsign-compare] 20 | for(int i = 0; i < max(a.cif.size(), b.cif.size()); i++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:93:9: warning: unused variable 'prev' [-Wunused-variable] 93 | int prev = 1, st = 1; | ^~~~