Var
A:array[1..100] of integer;
T,i,n:integer;
Procedure nhap;
Begin
Assign(fi,'b5.inp');reset(fi);
Assign(fo,'b5.out');rewrite(fo);
Readln(fi,n);
For i:=1 to n do
Read(fi,a[i]);
End;
Procedure xuly;
Begin
T:=0;
For i:=1 to n do
If a[i] mod 2=0 then t:=t+a[i];
Write(fo,t);
Close(fi);close(fo);
End;
Begin
Nhap;
Xuly;
End.