Compilare: user.cpp: In constructor ‘MinHeap::MinHeap(unsigned int, unsigned int)’: user.cpp:2:23: warning: integer overflow in expression [-Woverflow] #define oo ((1<<31) - 1) ^ user.cpp:35:56: note: in expansion of macro ‘oo’ MinHeap(unsigned int n, unsigned int root): keys(n+1, oo), ph(n+1, -1) { ^ user.cpp: In member function ‘void Graph::Dijkstra(unsigned int, void (*)(unsigned int))’: user.cpp:90:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[x].size(); i++) { ^