823 B | 809 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
sys.setrecursionlimit(10**7)
BLANK = " "
#inp = input
inp = lambda : sys.stdin.readline().rstrip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
n, s = mii()
crt = s
cnt = 0
for i in range(n):
query = input()
if query[-1] == 'L':
# 라떼
quantity = int(query[:-1]) + 1
else:
#에스프레소
quantity = int(query)
if crt >= quantity:
crt -= quantity
else:
cnt += 1
crt = s - quantity
p(cnt)
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()