func main()
	var T: int :: cui@input().toInt(&)
	for(1, T)
		do solve(cui@input())
	end for
	
	func solve(S: []char)
		var n: int :: ^S
		var old: []int :: #[n]int
		for i(0, ^S - 1)
			do old[i] :: S[i] $ int - '0' $ int
		end for
		while(n > 1)
			var new: []int :: #[n - 1]int
			for i(0, n - 2)
				do new[i] :: old[i] + old[i + 1]
				do new[i] :: new[i] / 10 + new[i] % 10
			end for
			do old :: ##new
			do n :- 1
		end while
		
		var ans: int :: old[0]
		do cui@print("\{ans}\n")
	end func
end func