#!/usr/bin/env python3
from sys import maxsize, stdin

_tokens = (y for x in stdin for y in x.split())
def read(): return next(_tokens)
def iread(): return int(next(_tokens))


def main():
    n, d, k = iread(), iread(), iread()
    A = [iread() for _ in range(n)]
    C = [iread() for _ in range(n)]
    INF = maxsize
    dp = [[-INF for _ in range(k + 1)] for _ in range(d + 1)]
    dp[0][0] = 0
    for a, c in zip(A, C):
        for i in range(d - 1, -1, -1):
            ni = i + 1
            for j in range(k, -1, -1):
                nj = min(k, j + c)
                if dp[i][j] == -INF:
                    continue
                dp[ni][nj] = max(dp[ni][nj], dp[i][j] + a)
    ans = dp[d][k]
    if ans == -INF:
        print('No')
    else:
        print(ans)


if __name__ == '__main__':
    main()