Compilare: main.cpp: In member function 'bool FlowGraph::setPi(int, int)': main.cpp:32:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<FlowGraph::Edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for (int idxe = 0; idxe < edges.size(); idxe++) | ~~~~~^~~~~~~~~~~~~~ main.cpp: In member function 'bool FlowGraph::dijkstra(int, int)': main.cpp:71:26: warning: comparison of integer expressions of different signedness: 'std::vector<FlowGraph::Edge>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 71 | if (edges.size() >= 4 * n) | ~~~~~~~~~~~~~^~~~~~~~ main.cpp:81:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 81 | auto [d, from] = pq.top(); pq.pop(); | ^