def Map():
  return list(map(int,input().split()))

N,X,Y = Map()
Z = X + Y
C = [0 for i in range(min(Z,N))]
ans = 0
for i in range(N):
  j = i % Z
  P,c = map(str,input().split())
  P = int(P)
  if c == 'A':
    C[j] += P
  else:
    C[j] -= P
    ans += P
C.sort()
y = len(C)
x = 0
while y > Y:
  ans += C.pop()
  y -= 1
  x += 1
while x < X and len(C):
  if C[-1] > 0:
    ans += C.pop()
    y -= 1
    x += 1
  else:
    break
print(ans)