Compilare: user.cpp: In function ‘int main()’: user.cpp:10:15: warning: iteration 9998u invokes undefined behavior [-Waggressive-loop-optimizations] if(totient[i]==i) ^ user.cpp:9:2: note: containing loop for(i=2;i<=10001;++i) ^ user.cpp:8:36: warning: iteration 9999u invokes undefined behavior [-Waggressive-loop-optimizations] for(i=1;i<=10001;++i) totient[i]=i; ^ user.cpp:8:2: note: containing loop for(i=1;i<=10001;++i) totient[i]=i; ^