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works now, i edited the code...

[cpp]#include <algorithm>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <cstdio>

using namespace std;


#define to_string(nmbr, strng) { static char _to_string_buffer[100]; sprintf( _to_string_buffer, "%d", nmbr ); (strng) = string(_to_string_buffer); }
#define ...

Well, i got problems with this easy task.
The hardest part is... To find the bug (if any) in my solution.
As ACM is known by it's "bugs" with different conditions in input, for instance entering 0 where it should not be etc, i need some help with this one

my algorithm is prety normal.
for 999 ...