Compilare: user.cpp: In function ‘int main()’: user.cpp:94:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,k,cnt,x,mask; ^ user.cpp:94:13: warning: unused variable ‘k’ [-Wunused-variable] int i,j,k,cnt,x,mask; ^ user.cpp: In function ‘int dij(int)’: user.cpp:78:1: warning: control reaches end of non-void function [-Wreturn-type] } ^