完美 第一题。。。。为啥只能80%啊。。。。求教

w = list(map(int,input().split()))
limit = int(input())
sum = 0

weight = []
for i in w:
    if i <= limit:
        weight.append(i)

while weight:
    m = max(weight)
    n = min(weight)
    try:
        if (m + n)  <= limit:
            sum += 1
            weight.pop(weight.index(m))
            weight.pop(weight.index(n))
        else :
            sum += 1
            weight.pop(weight.index(m))
    except Exception:
        pass

print(sum)