Compilare: user.cpp: In function ‘void bellman_ford()’: user.cpp:41:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v[nod].size(); i++) ~^~~~~~~~~~~~~~ user.cpp: In function ‘int dijkstra()’: user.cpp:63:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v[nod].size(); i++) ~^~~~~~~~~~~~~~ user.cpp:52:13: warning: unused variable ‘cst’ [-Wunused-variable] int nod,cst,i; ^~~