#!/usr/bin/python3
import fileinput

rope = []
for i in range(0, 10):
	rope.append([0, 0])
visit = {(0, 0)}

# Head index, tail index, direction
def move(hi, ti, dir):
	global rope
	hx, hy = rope[hi]
	tx, ty = rope[ti]

	# Move the head (if this is in fact the head)
	if dir == 'R':
		hx += 1
	elif dir == 'L':
		hx -= 1
	elif dir == 'D':
		hy += 1
	elif dir == 'U':
		hy -= 1

	# Now move the tail if necessary
	if (abs(tx - hx) <= 1) and (abs(ty - hy) <= 1):
		pass
	elif tx == hx:
		if ty < hy:
			ty += 1
		else:
			ty -= 1
	elif ty == hy:
		if tx < hx:
			tx += 1
		else:
			tx -= 1
	else:
		# Tail must move diagonally
		if tx < hx:
			tx += 1
		else:
			tx -= 1
		if ty < hy:
			ty += 1
		else:
			ty -= 1

	# Update rope
	rope[hi] = [hx, hy]
	rope[ti] = [tx, ty]

for line in fileinput.input():
	dir, dist = line.rstrip().split(' ')
	for i in range(0, int(dist)):
		# Head moves in the specified direction.
		# The rest of the rope just follows along.
		move(0, 1, dir)
		for j in range(1, len(rope) - 1):
			move(j, j+1, "")
		visit.add(tuple(rope[-1]))

print(len(visit))