def Cactus():
	size = get_world_size()
	init_plant(size, Entities.Cactus)
	goto((0,0))

	field = []
	for y in range(size):
		row = []
		for x in range(size):
			goto((x,y))
			better_plant(Entities.Cactus)
			row.append(measure())
		field.append(row)

	for y in range(size):
		curr = field[y]
		while not is_sorted(curr):
			for x in range(size):
				goto((x,y))
				if measure(East) < measure():
					swap(East)
				if measure(North) < measure():
					swap(North)
			for x in range(size):
				goto((x,y))
				curr[x] = measure()
	
	for i in range(len(field)-1, 0, -1):
		quick_print(field[i], is_sorted(field[i]))
		
while num_items(Items.Cactus) < 3000:
	harvest()
	Cactus()

def diag_sort(mat):
	lst = []
	n, m = len(mat), len(mat[0])
	# leftmost column
	for i in range(n):
		lst.append([i, 0])
        
	# rightmost row
	for i in range(m):
		lst.append([0, i])
	
	lst.pop(0)

	for el in lst:
		i, j = el[0], el[1] 
		arr = []
		
		# getting the diagonal elements
		while i < n and j < m:
			arr.append(mat[i][j])
			i, j = i+1, j+1
		
		arr = insertion_sort(arr)
		
		i, j = el[0], el[1]
		# setting the element in sorted order
		while i < n and j < m:
			mat[i][j] = arr.pop(0)
			i, j = i+1, j+1
	return mat


m1 = [
	[4,5,6],
	[9,8,7],
	[2,3,1]
	]
for el in m1:
	quick_print(el)	 
m1 = diag_sort(m1)
quick_print("")
for el in m1:
	quick_print(el)