2.3.5WA 求助

def liqi(x):
    return x[1]
sum = 0
n,s = input().split()
n,s = int(n), int(s)
a,b = input().split()
a,b = int(a), int(b)
c = a+b
apples = []
for i in range(n):
    apples.append(input().split(' '))
apples.sort(key=liqi)
for i in range(len(apples)):
    if int(apples[i][0]) <= c and int(apples[i][1]) <= s:
        s = s - int(apples[i][1])
        sum+=1
print(sum)

谢谢大佬了