local ffi = require 'ffi'
local C = ffi.C
ffi.cdef 'int scanf(const char *, ...);'

io.write((function (n, cd)
	C.scanf("%d",cd)
	local l,p,d=cd[0],cd[0],2e5+1
	for i=2,n-1 do
		C.scanf("%d",cd)
		if d>(cd[0]-p) then d=cd[0]-p end
		p=cd[0]
	end
	C.scanf("%d",cd)
	if d>(cd[0]-p) then d=cd[0]-p end
	return d, "\n", cd[0]-l, "\n"
end)(io.stdin:read("*n"), ffi.new("int[1]")))