Compilare: main.cpp: In member function 'BigInt BigInt::operator+(BigInt)': main.cpp:32:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | while (i < digits.size() || i < other.digits.size() || carry) { | ~~^~~~~~~~~~~~~~~ main.cpp:32:47: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | while (i < digits.size() || i < other.digits.size() || carry) { | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:33:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | if (i < digits.size()) | ~~^~~~~~~~~~~~~~~ main.cpp:35:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | if (i < other.digits.size()) | ~~^~~~~~~~~~~~~~~~~~~~~