Compilare: main.cpp: In function 'int32_t main()': main.cpp:41:16: warning: iteration 999998 invokes undefined behavior [-Waggressive-loop-optimizations] 41 | ciur[i]=1; | ~~~~~~~^~ main.cpp:40:20: note: within this loop 40 | for (int i=2; i<=1000000; i++) { | ~^~~~~~~~~ main.cpp:45:19: warning: iteration 999999 invokes undefined behavior [-Waggressive-loop-optimizations] 45 | if (ciur[i]) { | ~~~~~~^ main.cpp:44:20: note: within this loop 44 | for (int i=1; i<=1000000; i++) { | ~^~~~~~~~~ main.cpp:41:16: warning: 'void* __builtin_memset(void*, int, long unsigned int)' forming offset 1000000 is out of the bounds [0, 1000000] of object 'ciur' with type 'bool [1000000]' [-Warray-bounds] 41 | ciur[i]=1; | ~~~~~~~^~ main.cpp:9:6: note: 'ciur' declared here 9 | bool ciur[1000000]; | ^~~~