Compilare: user.cpp: In function ‘int main()’: user.cpp:27:12: warning: unused variable ‘nl’ [-Wunused-variable] int n, nl, q, x, y, c, dst, d2; ^ user.cpp:27:16: warning: unused variable ‘q’ [-Wunused-variable] int n, nl, q, x, y, c, dst, d2; ^ user.cpp:27:19: warning: unused variable ‘x’ [-Wunused-variable] int n, nl, q, x, y, c, dst, d2; ^ user.cpp:27:22: warning: unused variable ‘y’ [-Wunused-variable] int n, nl, q, x, y, c, dst, d2; ^ user.cpp:27:25: warning: unused variable ‘c’ [-Wunused-variable] int n, nl, q, x, y, c, dst, d2; ^ user.cpp:27:28: warning: unused variable ‘dst’ [-Wunused-variable] int n, nl, q, x, y, c, dst, d2; ^ user.cpp:27:33: warning: unused variable ‘d2’ [-Wunused-variable] int n, nl, q, x, y, c, dst, d2; ^ user.cpp:28:15: warning: unused variable ‘INF’ [-Wunused-variable] const int INF = 50000001; ^