Compilare: main.cpp: In member function 'void Graph::Kruskal(std::ofstream&)': main.cpp:137:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 137 | for(int j = 0; j < adj[i].size(); ++j){ | ~~^~~~~~~~~~~~~~~ main.cpp:156:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 156 | for(;i < edges.size() && cnt <= E - 1; ++i){ | ~~^~~~~~~~~~~~~~