import sys
readline = sys.stdin.readline

N, M, K = map(int, readline().split())
op, *A = readline().strip().split()
A = [int(a) for a in A]
A.sort(reverse = True)
B = [int(readline()) for _ in range(N)]
res = 0
for b in B:
    ok = -1
    ng = M
    while abs(ok-ng)>1:
        med = (ok+ng)//2
        if eval(f'{A[med]}{op}{b}') >= K:
            ok = med
        else:
            ng = med
    res += 1+ok
print(res)