import sys

sys.setrecursionlimit(200005)
# sys.set_int_max_str_digits(200005)
int1 = lambda x: int(x)-1
pDB = lambda *x: print(*x, end="\n", file=sys.stderr)
p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr)
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()

dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
# inf = -1-(-1 << 31)
inf = -1-(-1 << 62)

# md = 10**9+7
md = 998244353

n,d,k=LI()
aa=LI()
cc=LI()

def chmax(i,j,val):
    if val>dp[i][j]:dp[i][j]=val

dp=[[-inf]*(k+1) for _ in range(d+1)]
dp[0][0]=0
for a,c in zip(aa,cc):
    for i in range(d)[::-1]:
        for j in range(k+1):
            pre=dp[i][j]
            if pre==-inf:continue
            nj=min(j+c,k)
            chmax(i+1,nj,pre+a)

if dp[d][k]==-inf:
    print("No")
else:
    print(dp[d][k])