n = io.read("*n")
t = {}
for i = 1, n, 1 do
    a = io.read("*n")
    if(t[a] == nil) then
        t[a] = true
    elseif(t[a] == true) then
        t[a] = false
    end
end
c = 0
for k, v in pairs(t) do
    if(v == true) then c = c + 1 end
end
io.write(c)