var
i,m,r,k,b_cur,res:integer;
stop:boolean;
begin

readln(m);
read(r);
readln(k);
b_cur := r * 100 + k;
repeat
inc(i);

if k - m < 0 then 
  if r - 1 >= 0 then
    begin
    dec(r);
    k := k + 100 - m; 
    end
   else
    stop := True
else
  k := k - m;

if stop = False then
  begin
  r := r + k;
  k := r - k;
  r := r - k;  

  if b_cur < r * 100 + k then
    begin
    res := i;
    b_cur := r * 100 + k;
    end;
  end;

until stop;

writeln(res);  
end.