program lich4;

{$APPTYPE CONSOLE}

uses
  SysUtils;

var a:array[1..10000000] of integer;
n,n0,k,k0,i,j:integer;
begin
readln(n,k);
for i:=1 to n do a[i]:=i;
n0:=n;
k0:=1;
while n>1 do
begin
//writeln('n=',n,' k0= ',k0);
if k0+k<=n+1 then k0:=k0+k-1 else k0:=(k mod n)-(n-k0)-1;
n:=n-1;
for j:=k0 to n do a[j]:=a[j+1];
//for j:=1 to n do write(a[j]);
//readln;
end;
  { TODO -oUser -cConsole Main : Insert code here }
end.