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  1. program ideone;
  2. var
  3. m,n : longint;
  4. begin
  5. m:=1;
  6. readln(n);
  7. if (m = n) then begin
  8. writeln('ya');
  9. end;
  10. while m < n do begin
  11. m := m*2;
  12. if (m=n) then begin
  13. writeln('ya');
  14. end;
  15. end;
  16.  
  17. if (m > n) and (n >= 1) then begin
  18. writeln('bukan')
  19. end;
  20. end.
Success #stdin #stdout 0s 340KB
stdin
12
stdout
bukan