Compilare: user.cpp: In function ‘void Dijkstra()’: user.cpp:33:28: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(viz[r[v]] && r[v]<r[(*it).second] || r[v]==0) ^ user.cpp:15:7: warning: unused variable ‘i’ [-Wunused-variable] { int i,di,v; ^ user.cpp: In function ‘int main()’: user.cpp:43:17: warning: unused variable ‘j’ [-Wunused-variable] int i,x,y,z,j; ^