input = open("input.txt", "r").read().splitlines()

pos = 50
password = 0

for line in input:
    if line.startswith('L'):
        pos -= int(line[1:])
    elif line.startswith('R'):
        pos += int(line[1:])
    
    # keep subtracting or adding 100 until position is between 0 and 99 
    while pos < 0 or pos > 99:
        if pos < 0:
            pos += 100
            password += 1
        elif pos > 99:
            pos -= 100
            password += 1

print(password)