Compilare: main.cpp: In member function 'void BigInt::normalize()': main.cpp:17:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(int i = 0; i < v.size(); i ++) { | ~~^~~~~~~~~~ main.cpp:23:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | if(i == v.size() - 1) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'std::ofstream& operator<<(std::ofstream&, const BigInt&)': main.cpp:60:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | if(i != value.v.size() - 1){ | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'BigInt BigInt::operator+(const BigInt&)': main.cpp:75:26: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare] 75 | for(int i = 0; i < std::max(v.size(), other.v.size()); i ++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:77:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | if(i < v.size()) | ~~^~~~~~~~~~ main.cpp:79:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | if(i < other.v.size()) | ~~^~~~~~~~~~~~~~~~ main.cpp: In member function 'BigInt BigInt::operator+(const int&)': main.cpp:90:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 90 | for(int i = 0; i < v.size(); i ++) | ~~^~~~~~~~~~ main.cpp: In member function 'BigInt BigInt::operator-(const BigInt&)': main.cpp:99:26: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare] 99 | for(int i = 0; i < std::max(v.size(), other.v.size()); i ++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:101:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | if(i < v.size()) | ~~^~~~~~~~~~ main.cpp:103:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 103 | if(i < other.v.size()) | ~~^~~~~~~~~~~~~~~~