N, X, Y = map(int, input().split())
assert 1 <= N <= 200000
assert 0 <= X <= 200000
assert 0 <= Y <= 200000
assert X + Y >= 1

P = []
C = []
for _ in range(N):
    p, c = map(str, input().split())
    P.append(int(p))
    C.append(c)
diffs = [0 for _ in range(X + Y)]
for i in range(N):
    if C[i] == 'A':
        diffs[i % (X + Y)] += P[i]
    else:
        diffs[i % (X + Y)] -= P[i]

diffs.sort()
# print(diffs)

ans = sum(P)
for i in range(X + Y):
    if i >= Y:
        ans += diffs[i]
    else:
        ans -= diffs[i]
print(ans // 2)