1).int main()
{int a,b,i;
cin>>a;
cin>>b;
for(i=a; i<=b; i++)
if(i%2==0)
cout<<i<<" ";
2)int main ()
.{int a,b,i,c=0;
cin>>a;
cin>>b
;for(i=a; i<=b; i++)
if(i%10==3)
c++;
cout<<c;
}
3).
int main()
{int a,b,i,p=1;
cin>>a;
cin>>b;
for(i=a; i<=b; i++)
if(i%2==1)
p=p*i;
cout<<p;
4).
int main()
{int a,b,i,maxx=-9999;
cin>>a;
cin>>b;
for(i=a; i<=b; i++)
if(i>maxx&&i%2==1)
maxx=i;
cout<<maxx;