Compilare: main.cpp: In member function 'std::vector<int>& Graph::operator[](int)': main.cpp:36:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | if(index > this->adjList.size() || index < 0){ | ~~~~~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Solution::Ghizi()': main.cpp:246:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 246 | for(int i = 0; i < vol.size(); ++i){ | ~~^~~~~~~~~~~~ main.cpp: In member function 'void Solution::Paznici()': main.cpp:316:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 316 | for(int j = 0; j < a.size(); ++j){ | ~~^~~~~~~~~~ main.cpp: In member function 'void Solution::NoPrimeSum()': main.cpp:371:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 371 | for(int i = 0; i < leftNodes.size(); ++i){ | ~~^~~~~~~~~~~~~~~~~~ main.cpp:372:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 372 | for(int j = 0; j < rightNodes.size(); ++j){ | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:379:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 379 | for(int i = 1; i <= leftNodes.size(); ++i){ | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:382:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 382 | for(int i = 1; i <= rightNodes.size(); ++i){ | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:388:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 388 | for(int i = 0; i < leftNodes.size(); ++i){ | ~~^~~~~~~~~~~~~~~~~~ main.cpp:393:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 393 | for(int i = 0; i < rightNodes.size(); ++i){ | ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'std::vector<std::vector<int> > Solution::validArrangement(std::vector<std::vector<int> >&)': main.cpp:421:13: warning: unused variable 'n' [-Wunused-variable] 421 | int n = pairs.size(); | ^