from collections import defaultdict

dic = defaultdict(int)
N, W, D = map(int, input().split())
TWV = [list(map(int, input().split())) for _ in range(N)]
dp = [[-1] * (W + 1) for _ in range(2)]
dp[0][0] = 0
dp[1][0] = 0
for t, w, v in TWV:
    for i in reversed(range(W - w + 1)):
        if dp[t][i] >= 0:
            dp[t][i + w] = max(dp[t][i + w], dp[t][i] + v)
ans = 0
for i in range(W + 1):
    for j in range(W - i + 1):
        if abs(i - j) > D:
            continue
        if dp[0][i] != -1 and dp[1][j] != -1:
            ans = max(ans, dp[0][i] + dp[1][j])
print(ans)