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:22:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | if(i < a.cif.size()) | ~~^~~~~~~~~~~~~~ main.cpp:24:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | if(i < b.cif.size()) | ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:114:9: warning: unused variable 'prev' [-Wunused-variable] 114 | int prev = 1, st = 1; | ^~~~