#!/usr/bin/env python3
import numpy as np

lines = (x.strip() for x in open("input.txt"))
positions = set()
rope = [np.array((0, 0)) for _ in range(10)]
dirs = {d: p for d, p in zip("UDLR", ((1, 0), (-1, 0), (0, -1), (0, 1)))}

for line in lines:
    d, n = dirs[line[0]], int(line[2:])
    for _ in range(n):
        rope[0] += d
        for i in range(1, len(rope)):
            diff = rope[i-1] - rope[i]
            rope[i] += np.sign(diff) if sum(np.abs(diff)) > 2 else np.sign(diff - np.sign(diff))
        positions.add(tuple(rope[len(rope)-1]))

print(len(positions))