Compilare: main.cpp: In function 'int main()': main.cpp:15:24: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 15 | if (i % 2 == 0 && i != 2 || i % 3 == 0 && i != 3) { | ~~~~~~~~~~~^~~~~~~~~ main.cpp:11:14: warning: iteration 1999998 invokes undefined behavior [-Waggressive-loop-optimizations] 11 | a[i] = 0; | ~~~~~^~~ main.cpp:10:23: note: within this loop 10 | for (int i = 2; i <= 2000000; ++i) { | ~~^~~~~~~~~~ main.cpp:11:14: warning: 'void* __builtin_memset(void*, int, long unsigned int)' forming offset [8000000, 8000003] is out of the bounds [0, 8000000] of object 'a' with type 'int [2000000]' [-Warray-bounds] 11 | a[i] = 0; | ~~~~~^~~ main.cpp:8:9: note: 'a' declared here 8 | int a[2000000], n; | ^