Compilare: main.cpp: In member function 'BigInt BigInt::operator+(const BigInt&)': main.cpp:29:23: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare] 29 | for (int i = 0; i < min(digits.size(), other.digits.size()); ++i) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:35:61: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for (int i = min(digits.size(), other.digits.size()); i < digits.size(); | ~~^~~~~~~~~~~~~~~ main.cpp:43:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | i < other.digits.size(); ++i) { | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'BigInt BigInt::operator*(int)': main.cpp:58:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for (int i = 0; i < digits.size(); ++i) { | ~~^~~~~~~~~~~~~~~