Compilare: user.cpp: In function ‘void DijkstraA(int)’: user.cpp:44:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graf[nod].size();i++) ^ user.cpp:42:23: warning: unused variable ‘cost’ [-Wunused-variable] long long int cost=(*Heap.begin()).first; ^ user.cpp: In function ‘void DijkstraB(int)’: user.cpp:67:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graf[nod].size();i++) ^ user.cpp:65:23: warning: unused variable ‘cost’ [-Wunused-variable] long long int cost=(*Heap.begin()).first; ^ user.cpp: In function ‘void DijkstraC(int)’: user.cpp:90:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graf[nod].size();i++) ^ user.cpp:88:23: warning: unused variable ‘cost’ [-Wunused-variable] long long int cost=(*Heap.begin()).first; ^