func main()
	var l: int :: cui@inputInt()
	var r: int :: cui@inputInt()
	var m: int :: cui@inputInt()
	if(l > m)
		do l :: m
	end if
	if(r > m)
		do r :: m
	end if
	
	var f: []int :: #[m + 1]int
	
	do f[0] :: 1
	for i(1, m)
		do f[i] :: i * f[i - 1] % m
	end for
	
	var ff: []int :: #[m + 1]int
	do ff[0] :: 1
	for i(1, m)
		do ff[i] :: f[i] * ff[i - 1] % m
	end for
	
	var ans: int :: 0
	
	for i(l, r)
		do ans :+ ff[i]
		do ans :% m
	end for
	
	do cui@print("\{ans}\n")
end func