Compilare: main.cpp: In member function 'BigInt BigInt::operator+(const BigInt&) const': main.cpp:33:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | while (i < digits.size() || i < other.digits.size() || carry) { | ~~^~~~~~~~~~~~~~~ main.cpp:33:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | while (i < digits.size() || i < other.digits.size() || carry) { | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:34:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | if (i < digits.size()) | ~~^~~~~~~~~~~~~~~ main.cpp:36:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | if (i < other.digits.size()) | ~~^~~~~~~~~~~~~~~~~~~~~