program Rvl;
var all,n,m,z :integer;
    f1,f2:text;
begin
assign(f1,'TREE.DAT');
reset(f1);
read(f1,n,m);
close(f1);


z:=n;
all:=n;
while (z<m) do begin z:=z+n-1; all:=all+n; end;

assign(f2,'TREE.SOL');
rewrite(f2);
if z>m then write(f2,'mishtch') else write(f2,all);
close(f2);
end.