with open(r'day1/input.txt', 'r') as input:
    lines =  input.read().split('\n')[:-1] 


count = 0
curr = 50
for line in lines:
    rot,num = line[0],int(line[1:])
    curr += num if rot == "R" else -num
    if curr%100 == 0: count += 1

print(count)