Compilare: user.cpp: In function ‘int lca(int, int)’: user.cpp:11:8: warning: unused variable ‘nivc’ [-Wunused-variable] int c, nivc; ^ user.cpp: In function ‘int main()’: user.cpp:28:21: warning: unused variable ‘j’ [-Wunused-variable] int i, x, y, m, j, rad; ^ user.cpp:37:9: warning: unused variable ‘dist’ [-Wunused-variable] int dist; ^ user.cpp:35:15: warning: ‘rad’ may be used uninitialized in this function [-Wmaybe-uninitialized] niv[rad]=1; ^