N,D,K=list(map(int,input().split()))
A=list(map(int,input().split()))
C=list(map(int,input().split()))
dp=[]
for i in range(D+1):
    dp.append([-10**18]*(K+1))
dp[0][0]=0
for i in range(N):
	ndp=[]
	for j in range(D+1):
		ndp.append([-10**18]*(K+1))
	for j in range(D+1):
		for k in range(K+1):
			if dp[j][k]<=-10**14:
				continue
			ndp[j][k]=max(dp[j][k],ndp[j][k])
			if j!=D:
			  ndp[j+1][min(K,k+C[i])]=max(ndp[j+1][min(K,k+C[i])],dp[j][k]+A[i]+10**10)
	for j in range(D+1):
		for k in range(K+1):
			dp[j][k]=ndp[j][k]
	#print(dp)
if dp[D][K]<=-10**14:
	print("No")
	exit()
print(dp[D][K]-10**10*D)
#print("Yes")