Program HOC24;
var st,st1,st2: string;
i: byte;
f: text;
const fi='SPLIT.INP ' ;
    fo = 'SPLIT.OUT' ;
Procedure ip;
begin
        assign(f,fi);
        reset(f);a
        read(f,st);
        close(f);
end;
Procedure out;
begin
        assign(f,fo);
        rewrite(f);
     st1:='' st2:=''
        for i:=1 to length(st) do
                begin
                        if st[i] in ['A'..'z'] then st1:=st1+st[i];
                        if st[i] in ['0'..'9'] then st2:=st2+st[i];
                end;
        writeln(f,st1);
        write(f,st2);
        close(f);
end;
Begin
ip;
out;
End.

uses crt;

var x,n,i,t:integer;

begin

clrscr;

readln(n);

t:=0;

for i:=1 to n do 

begin

readln(x);

if x mod 2=0 then t:=t+x;

end;

writeln(t);

readln;

end.

program ideone;
var i,n,x,res:longint;
begin
readln(n);
res:=0;
for i:=1 to n do 
begin
read(x);
if x mod 2 = 0 then
res:=res+x;
end;
write(res);

end.

uses crt;

var a:array[1..100]of integer;

i,n,t,j,tam:integer;

begin

clrscr;

readln(n,k);

for i:=1 to n do readln(a[i]);

for i:=1 to n-1 do

for j:=i+1 to n do

if a[i]>a[j] then begin tam:=a[i]; a[i]:=a[j]; a[j]:=tam; end;

write(a[k]);

readln;

end.

program sonho;

var

     arr:array[1..100] of integer;

     k, n, i, min: integer;

begin

     write('Nhap n: ');

      readln(n);

     write('Nhap cac phan tu cua day: ');

     for i := 1 to n do

     begin

          readln(arr[i]);

     end;

     write('Nhap k: ');

     readln(k);

     min := arr[1];

     for i := 2 to k do

     begin

          if (arr[i] < min) then

               min := arr[i];

     end;

     writeln('So nho thu ', k, ' trong day la: ', min);

end.

var A:

     array[1..n] of integer;

     i, j, n: integer;

begin

     write('Nhap so phan tu cua mang: ');

     readln(n);

     for i := 1 to n do

     begin

          write('Nhap phan tu thu ', i, ': ');

          readln(A[i]);

     end;

     for i := 1 to n - 1 do

         for j := i+1 to n do

            if (A[i] mod 2 = 0) and (A[j] mod 2 = 0) and (A[i] < A[j]) or (A[i] mod 2 = 1) and (A[j] mod 2 = 1) and (A[i] > A[j]) then

            begin

                swap(A[i], A[j]);

            end;

     writeln('Mang da sap xep la: ');

      for i := 1 to n do

         writeln(A[i]);

end.

Var a:array[1..100] of integer;

i,s:integer;

Begin

For i:=1 to 100 do

Begin

Write('Nhap phan tu thu ',i,' = ');readln(a[i]);

If a[i] mod 2 <> 0 then s:=s+a[i];

End;

Write('Tong la ',s);

Readln;

End.

uses crt;

var a:array[1..50]of real;

i,n:integer;

t:real;

begin

clrscr;

for i:=1 to 50 do readln(a[i]);

t:=0; for i:=1 to 50 do t:=t+a[i];

writeln(t/50:4:2);

readln;

end.