Compilare: main.cpp: In function 'int main()': main.cpp:23:15: warning: iteration 9999999 invokes undefined behavior [-Waggressive-loop-optimizations] 23 | phi[i]=i; | ~~~~~~^~ main.cpp:22:14: note: within this loop 22 | for(i=1;i<=MAXN;i++) | ~^~~~~~ main.cpp:25:17: warning: iteration 9999998 invokes undefined behavior [-Waggressive-loop-optimizations] 25 | if(phi[i]==i) | ~~~~~^ main.cpp:24:14: note: within this loop 24 | for(i=2;i<=MAXN;i++) | ~^~~~~~