n,d,k=map(int,input().split())
a=list(map(int,input().split()))
c=list(map(int,input().split()))
dp=[[[-10**18 for _ in range(k+1)]for _ in range(d+1)]for _ in range(n+1)]
dp[0][0][0]=0 
for i in range(n):
	for j in range(d+1):
		for l in range(k+1):
			dp[i+1][j][l]=max(dp[i][j][l],dp[i+1][j][l])
			if j!=d:
				dp[i+1][j+1][min(k,l+c[i])]=max(dp[i][j][l]+a[i],dp[i+1][j+1][min(k,l+c[i])])
if dp[-1][-1][-1]<-10**17:
	print('No')
else:
	print(dp[-1][-1][-1])