isn`t it?

Edited by author 20.05.2004 13:49

YES it is But How to do it

it seems easy but not too easy

Hi i wanto say that why my program gives error:
here is my program:
var
   k,n,x,y,z:longint;
   a:array[1..100000] of longint;
   b:array[1..100000] of longint;
   c:array[1..100000] of longint;
begin
readln(n);
for k:=1 to n do
readln(x,y);
  a[k]:=x;
  b[k]:=y;
for k:=1 to n do
begin
c[k]:=((a[k]+b[k])+((a[k+1]+b[k+1]) div 10 ))mod 10;
write(c[k]);
end;
end.

Your algo is wrong for this task

sehvdi ozde kokunnen.

You forgot to write begin...end operators after entering values (for k:=1 to n do begin read(x, y) ...)

Else your algoritm seems me not correct. :)