from sys import setrecursionlimit as srl
srl(5*10**5)
n, m, l = list(map(int, input().split()))
E = []
for a in list(map(int, input().split())):
    E.append((a, 0))
for a in list(map(int, input().split())):
    E.append((a, 1))


mod = 1077541837
base = 10**4
base_ = pow(base, -1, mod)

E.sort()
inf = 1<<60
D = {}
def main(i, t0, mask, S, k):
    if (i, t0, mask, k) in D:
        return D[(i, t0, mask, k)]
    if k == 0:
        return 0
    if i == n+m:
        return inf
    a, t1 = E[i]
    if not S:
        S.append(a)
        rep = main(i+1, t1, a, S, k)
    elif t0 == t1:
        S.append(a)
        nmask = (mask * base + a) % mod
        rep = main(i+1, t0, nmask, S, k)
    else:
        b = S[-1]
        nmask = (mask - b) * base_ % mod
        rep = a-S.pop()
        rep += main(i+1, t0, nmask, S, k-1)
        rep = min(rep, main(i+1, t1, a, [a], k))
    D[(i, t0, mask, k)] = rep
    return rep

print(main(0, 0, 0, [], l))