Compilare: user.cpp: In function ‘int main()’: user.cpp:107:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &M); ^ user.cpp:110:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld", &A, &B); ^ In function ‘void ciur()’: cc1plus: warning: iteration 1000007u invokes undefined behavior [-Waggressive-loop-optimizations] user.cpp:59:2: note: containing loop for (int i = 2; i <= MAXN; i++) ^