奇安信笔试（含代码）
笔试挺简单的，但不知道为什么第一道题就80%,第二道题倒是直接ac了，有大佬知道为啥第一个就80%吗，求指导
第一题，先买性价比高的口罩
while 1: a = int(input()) list1 = [[1, 5], [2, 3], [2, 3], [2, 2], [5, 4], [3, 1]] count = 0 sum = 0 jilu = [] while a > 0 and list1: count = 0 for i in range(len(list1)): if a >= list1[i][0] and i not in jilu: a -= list1[i][0] sum += list1[i][1] count += 1 jilu.append(i) if count == 0: break print(sum)第二题，很简单，循环队列
class Lb:
class Node:
def __init__(self,item):
self.value=item
self.next=None
def __init__(self):
self.head=self.Node(None)
self.tail=self.Node(None)
self.head.next=self.tail
self.tail.next=self.head
self.total=[]
def add(self,item):
node1=self.Node(item)
node1.next=self.head.next
self.head.next=node1
def sump(self):
count=0
sum2=0
while self.head.value==None:
self.head=self.head.next
sum2 += self.head.value
self.head=self.head.next
while count<3:
if self.head.value!=None and self.head.value not in self.total and count<=1:
self.total.append(self.head.value)
sum2+=self.head.value
count+=1
self.head=self.head.next
elif self.head.value!=None and self.head.value not in self.total and count==2:
self.total.append(self.head.value)
sum2 += self.head.value
count += 1
elif self.head.value==None:
self.head = self.head.next
elif self.head.value!=None and self.head.value in self.total:
sum2 += self.head.value
break
return sum2
a=list(map(int,input().split(',')))
lb1=Lb()
for i in a[::-1]:
lb1.add(i)
sum1=lb1.sump()
sum2=lb1.sump()
sum3=lb1.sump()
if sum1==sum2 and sum2==sum3:
print("yes")
else:
print("no") 
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