program text;

{$APPTYPE CONSOLE}

var

  n,k,i,j,n1,n2,col,lastlen:integer;
  num1,num2:array[0..1000001] of byte;
  t1,t2:longword;

Procedure Add;
var
  i,carry:integer;
begin
  carry:=0;
  for i:=1 to high(num1) do
  begin
    carry:=carry+num1[i]+num2[i];
    if carry>=10 then
    begin
      num1[i]:=carry-10;
      carry:=1;
    end else
    begin
      num1[i]:=carry;
      carry:=0;
    end;
  end;
end;



begin
  { TODO -oUser -cConsole Main : Insert code here }
{ Assign(input,'Input.txt');
 reset(input);
 Assign(output,'output.txt');
 rewrite(output);

} fillchar(num1,sizeof(num1),0);
  fillchar(num2,sizeof(num2),0);

  readln(n);
  col:=0;
  k:=0;
  for i:=n downto 1 do
  begin
    readln(n1,n2);
    num1[i]:=n1;
    num2[i]:=n2;
  end;


    ADD;

  k:=high(num1);
  while num1[k]=0 do dec(k);

  if k=0 then writeln(0) else
  for i:=k downto 1 do  write(num1[i]);

end.

I think you should be more careful when you read the task.
Test
4
0 0
1 1
1 1
1 1
Answer
0222
And your program gives 222.

Edited by author 06.09.2006 15:38

THANK YOU :)

You're welcome!

I have made the same mistake.

;)

//but why me
#include<bits/stdc++.h>
using namespace std;
int main()
{
    long n,i,j=0;
    scanf("%ld",&n);
    int a[2000003],b=0;
    string s;
    n*=2;
    for(i=0;i<n;i++){
        scanf("%d",&a[i]);
    }
    for(i=n-1;i>=0;i=i-2){
            b=(b+a[i]+a[i-1]);
        s[j]=(b%10)+48;
        b=b/10;
        j++;
    }
    //if(b!=0){
        //cout<<b;
    //}
    for(i=j-1;i>=0;i--){
        printf("%c",s[i]);
    }
}