N,D,K = map(int,input().split())
A = [0]+list(map(int,input().split()))
C = [0]+list(map(int,input().split()))
INFTY = 10**12
dp = [[[-INFTY for _ in range(K+1)] for _ in range(D+1)] for _ in range(2)]
for k in range(K+1):
    if C[1]>=k:
        dp[1][1][k] = A[1]
dp[0][0][0] = 0
dp[1][0][0] = 0
for i in range(2,N+1):
    for j in range(1,D+1):
        if j>i:break
        for k in range(K+1):
            if j<i:
                dp[i%2][j][k] = dp[(i-1)%2][j][k]
            dp[i%2][j][k] = max(dp[i%2][j][k],dp[(i-1)%2][j-1][max(k-C[i],0)]+A[i])
if dp[N%2][D][K]<=-5*(10**11)-10:
    print("No")
else:
    print(dp[N%2][D][K])