Compilare: user.cpp: In function ‘int main()’: user.cpp:57:6: warning: unused variable ‘d’ [-Wunused-variable] int d, i, j, l, r, act; ^ user.cpp:57:12: warning: unused variable ‘j’ [-Wunused-variable] int d, i, j, l, r, act; ^ user.cpp:59:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:62:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &l, &r); ^