Compilare: user.cpp: In function ‘int main()’: user.cpp:34:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.cpp:38:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp:42:51: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &v[i].c, &v[i].p, &v[i].r); ^ user.cpp:62:52: warning: ‘cp2’ may be used uninitialized in this function [-Wmaybe-uninitialized] ll crtProf = -1LL * v[i].c * Q * X[i], cp2; ^~~