Compilare: main.cpp: In function 'void ciur()': main.cpp:32:12: warning: iteration 25000 invokes undefined behavior [-Waggressive-loop-optimizations] if(ww[i]==0) ~~~~^ main.cpp:31:14: note: within this loop for(i=3;i<=1000000;i+=2) ~^~~~~~~~~ main.cpp:25:14: warning: iteration 24999 invokes undefined behavior [-Waggressive-loop-optimizations] ww[i]=1; ~~~~~^~ main.cpp:24:14: note: within this loop for(i=4;i<=1000000;i+=2) ~^~~~~~~~~