Compilare: main.cpp: In function 'int main()': main.cpp:19:15: warning: iteration 199998 invokes undefined behavior [-Waggressive-loop-optimizations] if(e[i]==i) ~~~^ main.cpp:17:19: note: within this loop for(int i=2; i<=N; i++) ~^~~ main.cpp:16:33: warning: iteration 199998 invokes undefined behavior [-Waggressive-loop-optimizations] for(int i=2; i<=N; i++) e[i]=i; ~~~~^~ main.cpp:16:19: note: within this loop for(int i=2; i<=N; i++) e[i]=i; ~^~~