import sys
input = sys.stdin.readline

N,D,K=map(int,input().split())
A=list(map(int,input().split()))
C=list(map(int,input().split()))

DP=[[-1<<60]*(K+1) for i in range(D+1)]
DP[0][0]=0

for i in range(N):
    a,c=A[i],C[i]

    for j in range(D-1,-1,-1):
        for k in range(K,-1,-1):
            now=DP[j][k]

            DP[j+1][min(K,k+c)]=max(DP[j+1][min(K,k+c)],now+a)

ANS=DP[D][K]

if ANS<(-1<<50):
    print("No")
else:
    print(ANS)