Compilare: main.cpp: In member function 'void Graph::DFS(int, std::vector<int>&)': main.cpp:59:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for(int i = 0; i < edges[start].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In destructor 'Graph::~Graph()': main.cpp:73:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, double> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for(int i = 1; i <= edges.size(); ++i) | ~~^~~~~~~~~~~~~~~ main.cpp: In member function 'void Graph::printEdges()': main.cpp:79:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<int, double> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for(int i = 1; i < edges.size(); i++) | ~~^~~~~~~~~~~~~~ main.cpp: In member function 'std::stack<int> DirectedGraph::TopologicalSorting()': main.cpp:219:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<bool>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 219 | for(int node = 1; node < visited.size(); ++node) | ~~~~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:356:20: warning: unused variable 's' [-Wunused-variable] 356 | int n, m, x, y,s; | ^