Compilare: main.cpp: In function 'void ciur()': main.cpp:14:31: warning: iteration 499999 invokes undefined behavior [-Waggressive-loop-optimizations] 14 | for(i=4; i<=sz; i+=2) v[i]=1; | ~~~~^~ main.cpp:14:15: note: within this loop 14 | for(i=4; i<=sz; i+=2) v[i]=1; | ~^~~~ main.cpp:27:16: warning: iteration 1000000 invokes undefined behavior [-Waggressive-loop-optimizations] 27 | if(!v[i]) prim[k ++]=i; | ~~~^ main.cpp:25:15: note: within this loop 25 | for(i=2; i<=sz; i++) | ~^~~~