题解 | 小红比身高

friend_num , stare_num, Hong_height =map(int,input().split())
Fheight_list = list(map(int,input().split()))
stare_list = list(map(int,input().split()))
Height_list = list(map(int,input().split()))
total_height=[]
for i in range(0,friend_num):
    friend_totall = stare_list[i]
    sum_Height = Fheight_list[i]+ Height_list[friend_totall-1]
    total_height.append(sum_Height)
    i+=1

Height_list.sort()
Height_list.reverse()
Hong_total = Height_list[0]+Hong_height
count = 0
for i in total_height:
    if(i<Hong_total):
        count+=1
print(count)