label a1;
var n, m, r, nn, mn, nm, mm: longint;
begin
     read(n, m);
     if m > n then begin
        r := m;
        m := n;
        n := r;
     end;
     nn := round(int(sqrt(n - 1)));
     mn := round(int(sqrt(m - 1)));
     if nn = mn then begin
        nm := n - nn * nn;
        mm := m - mn * mn;
        r := abs(mm - nm);
        goto a1;
     end;
     r := nn - mn;
     r := r * 2;
     r := r - 1;
     nm := n - nn * nn;
     mm := m - mn * mn;
     if m mod 2 - mn mod 2 = 0 then
        r := r + 1;
     if abs(n mod 2 - nn mod 2) = 1 then
        r := r + 1;
     if (nm - mm > nn - mn + 1) then
        r := r + ((abs(nm - mm) - 1) div 2) * 2;
     if (mm - nm + 1 > nn - mn) then
        r := r + ((abs(nm - mm) + 1) div 2) * 2;
a1:  writeln(r);
end.

Edited by author 14.10.2005 20:52