A1-Y1-Y2-A2
A1-Y1-Y3-Y2-A2
A1-Y1-Y3-Y4-Y2-A2
A1-Y1-Y4-Y2-A2
A1-Y1-Y4-Y3-Y2-A2
begin
var m := 105;
var n := 15;
Println(1 + (m mod n) * (n mod m)); //1
end.
А учебник какой? Скажи тогда решу