Compilare: main.cpp: In member function 'void BigInt::normalize()': main.cpp:15:26: 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] 15 | for(int i = 0; i < v.size(); i ++) { | ~~^~~~~~~~~~ main.cpp:21:22: 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] 21 | if(i == v.size() - 1) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'std::ofstream& operator<<(std::ofstream&, const BigInt&)': main.cpp:43:18: 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] 43 | if(i != value.v.size() - 1){ | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'BigInt BigInt::operator+(const BigInt&)': main.cpp:58:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'const long unsigned int' [-Wsign-compare] 58 | for(int i = 0; i < std::max(v.size(), other.v.size()); i ++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:60:18: 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] 60 | if(i < v.size()) | ~~^~~~~~~~~~ main.cpp:62:18: 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] 62 | if(i < other.v.size()) | ~~^~~~~~~~~~~~~~~~ main.cpp: In member function 'BigInt BigInt::operator-(const BigInt&)': main.cpp:73:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'const long unsigned int' [-Wsign-compare] 73 | for(int i = 0; i < std::max(v.size(), other.v.size()); i ++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:75:18: 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] 75 | if(i < v.size()) | ~~^~~~~~~~~~ main.cpp:77:18: 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] 77 | if(i < other.v.size()) | ~~^~~~~~~~~~~~~~~~