Compilare: main.cpp: In constructor 'Permutation::Permutation(std::vector<int>&)': main.cpp:25:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for(int i = 1; i < x.size(); i ++) | ~~^~~~~~~~~~ main.cpp: In member function 'Permutation Permutation::operator*(Permutation&)': 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 | for(int i = 1; i < v.size(); i ++) | ~~^~~~~~~~~~ main.cpp: In member function 'Permutation Permutation::neutral()': main.cpp:41:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for(int i = 1; i < v.size(); i ++) | ~~^~~~~~~~~~ main.cpp: In member function 'Permutation Permutation::inverse()': main.cpp:49:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for(int i = 1; i < v.size(); i ++) | ~~^~~~~~~~~~ main.cpp: In member function 'Permutation Permutation::exp(Permutation&, long long int)': main.cpp:60:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for(int i = 1; i < p.v.size(); i ++) { | ~~^~~~~~~~~~~~ main.cpp:76:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for(int j = 0; j < pos.size(); j ++) { | ~~^~~~~~~~~~~~ main.cpp: In member function 'void Permutation::print()': main.cpp:85:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for(int i = 1; i < v.size() ; i++) | ~~^~~~~~~~~~