Compilare: main.cpp: In member function 'void BigInt::normalize()': main.cpp:14:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for(int i = 0; i < v.size(); i ++) { | ~~^~~~~~~~~~ main.cpp:20:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | if(i == v.size() - 1) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'std::ofstream& operator<<(std::ofstream&, const BigInt&)': main.cpp:42:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | if(i != value.v.size() - 1){ | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'BigInt BigInt::operator+(const BigInt&)': main.cpp:57:26: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare] 57 | for(int i = 0; i < std::max(v.size(), other.v.size()); i ++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:59:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | if(i < v.size()) | ~~^~~~~~~~~~ main.cpp:61:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | if(i < other.v.size()) | ~~^~~~~~~~~~~~~~~~ main.cpp: In member function 'BigInt BigInt::operator-(const BigInt&)': main.cpp:72:26: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare] 72 | for(int i = 0; i < std::max(v.size(), other.v.size()); i ++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:74:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | if(i < v.size()) | ~~^~~~~~~~~~ main.cpp:76:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | if(i < other.v.size()) | ~~^~~~~~~~~~~~~~~~