Compilare: main.cpp: In function 'int main()': main.cpp:16:30: warning: iteration 650001 invokes undefined behavior [-Waggressive-loop-optimizations] 16 | for(i=3; i<=N; i+=2) c[i]=1; | ~~~~^~ main.cpp:16:15: note: within this loop 16 | for(i=3; i<=N; i+=2) c[i]=1; | ^ main.cpp:22:31: warning: iteration 1300002 invokes undefined behavior [-Waggressive-loop-optimizations] 22 | for(i=3; i<=N; ++i) if(c[i]==1) a[++ct]=i; | ~~~^ main.cpp:22:15: note: within this loop 22 | for(i=3; i<=N; ++i) if(c[i]==1) a[++ct]=i; | ^