[已解决]Python：每日一题 152（悬赏篇）

inverseli

def judge(L):
    temp = 0
    for i in range(1,len(L)-1):#忽略最后一个和第一个
        if sum(L[:i]) == sum(L[i+1:]):
            temp = 1
            print(i)
    if temp == 0:
        print('None')
        
list_L= [[1, 3, 5, 7, 8, 25, 4, 20, 29],
[6, 5, 7, 9, 0, 5, 43, 2, 17, 13, 16],
[2, 31, 43, 234, 0, 10, 15, 310, 37, 43, 21],
[1, 3, 2, 546, 123, 546, 98, 543, 22, 424, 56, 23, 199, 934, 4],
[1, 2, 4, 34, 54, 27, 49, 14, 36, 25, 68, 13, 35, 78, 60, 25,
 17, 5, 9, 23, 2, 1, 8, 1, 33, 26, 1, 9, 11, 5, 5, 253, 47, 65, 56, 10]]
for L in list_L:
    judge(L)

丑帅哥

def sum(list_name,list_lenth):
    sum_1=0
    sum_2=0
    for a in range(list_lenth):
        sum_1=sum_1+list_name[a]
        for b in range(a+1,list_lenth):
            sum_2=sum_2+list_name[b]
        if sum_1 == sum_2 :
            print('列表：{}\n 平衡点位序为：{} \n 平衡值为：{}  '.format(list_name,a,list_name[a]))
            break
        else:
            sum_2=0
    else:
        print('Nnone')
list1=[1, 3, 5, 7, 8, 25, 4, 20, 29]
list2=[6, 5, 7, 9, 0, 5, 43, 2, 17, 13, 16]
list3=[2, 31, 43, 234, 0, 10, 15, 310, 37, 43, 21]
list4=[1, 3, 2, 546, 123, 546, 98, 543, 22, 424, 56, 23, 199, 934, 4]
list5=[1, 2, 4, 34, 54, 27, 49, 14, 36, 25, 68, 13, 35, 78, 60, 25, 17, 5, 9, 23, 2, 1, 8, 1, 33, 26, 1, 9, 11, 5, 5, 253, 47, 65, 56, 10]
sum(list1,len(list1))
sum(list2,len(list2))
sum(list3,len(list3))
sum(list4,len(list4))
sum(list5,len(list5))

victor.xu

def seek_balance(lis):
    n = 0
    if len(lis) % 2 == 1:
        while n < len(lis):
            if sum(lis[:n]) != sum(lis[n+1:]):
                n += 1
            else:
                break
    else:
        print('error')
    return (n,lis[n])
lis1 = eval(input('请输入一个数组：\n'))
(index1,result1) = seek_balance(lis1)
print('the index of the list: ', index1,'\n')
print('the Balance Point of the list: ',result1)

YBKathus

a = eval(input("请输入列表："))
for i in range(1,len(a)-1):
    if sum(a[:i]) == sum(a[i+1:]):print("平衡点为",i+1)

我这算不算偷懒了

125zl

from math import *
L = [[1, 3, 5, 7, 8, 25, 4, 20, 29],\
    [6, 5, 7, 9, 0, 5, 43, 2, 17, 13, 16],\
    [2, 31, 43, 234, 0, 10, 15, 310, 37, 43, 21],\
    [1, 3, 2, 546, 123, 546, 98, 543, 22, 424, 56, 23, 199, 934, 4],\
    [1, 2, 4, 34, 54, 27, 49, 14, 36, 25, 68, 13, 35, 78, 60, 25, 17, 5, 9, 23, 2, 1, 8, 1, 33, 26, 1, 9, 11, 5, 5, 253, 47, 65, 56, 10]]

for i in range(5):
    x = 0
    for j in range(1,len(L[i]) - 1):
        c1 = 0
        for k in range(j):
            c1 = c1 + L[i][k]
        if c1 == sum(L[i]) - c1 - L[i][j]:
            print(L[i][j])
            x = x + 1
    if x == 0:
        print(None)

大头目

def Check_num(list1):
       
        sum1 = 0
        sum2 = 0
        for i in range(1,len(list1)-1):
               
                a = list1[0:i]
                b = list1[i+1:]
               
                for x in a:
                        sum1 += x
                       
                for y in b:
                        sum2 += y
               
                #其实这一段可以用这一句话代替if sum(list1[:i]) == sum(list1[i+1:]):
                if sum1 == sum2:
                        return list1[i]
               
                sum1 = 0
                sum2 = 0
                       
print(Check_num([1, 3, 5, 7, 8, 25, 4, 20, 29]))
print(Check_num([6, 5, 7, 9, 0, 5, 43, 2, 17, 13, 16]))
print(Check_num([2, 31, 43, 234, 0, 10, 15, 310, 37, 43, 21]))
print(Check_num([1, 3, 2, 546, 123, 546, 98, 543, 22, 424, 56, 23, 199, 934, 4]))
print(Check_num([1, 2, 4, 34, 54, 27, 49, 14, 36, 25, 68, 13, 35, 78, 60, 25, 17, 5, 9, 23, 2, 1, 8, 1, 33, 26, 1, 9, 11, 5, 5, 253, 47, 65, 56, 10]))

Elastcio

def find(l):
    sum_of_list = sum(l)
    first_part = 0
    for i in range(len(l)-1):
        first_part += l[i]
        if first_part == (sum_of_list -l[i+1])/2:
            return(i+1)
    return "Not Find"
l1 = [1, 3, 5, 7, 8, 25, 4, 20, 29]
l2 = [6, 5, 7, 9, 0, 5, 43, 2, 17, 13, 16]
l3 = [2, 31, 43, 234, 0, 10, 15, 310, 37, 43, 21]
l4 = [1, 3, 2, 546, 123, 546, 98, 543, 22, 424, 56, 23, 199, 934, 4]
l5 = [1, 2, 4, 34, 54, 27, 49, 14, 36, 25, 68, 13, 35, 78, 60, 25, 17, 5, 9, 23, 2, 1, 8, 1, 33, 26, 1, 9, 11, 5, 5, 253, 47, 65, 56, 10]
for each in (l1, l2, l3, l4, l5):
    try:
        print(find(each),each[find(each)])
    except TypeError:
        print(find(each))

6 4
Not Find
Not Find
Not Find
Not Find

南城顾她

def main():
    a = [1, 3, 5, 7, 8, 25, 4, 20, 29]
    for x in range(len(a)):
        if sum(a[:x]) == sum(a[x+1:]):
            print(a[x])
            break
    else:
        print('None')



main()

graceasyi

一个列表可能有多个平衡点，比如：[1, 2, 3, -3, 3, 2, 1]，加上这种情况。

def slice(list1):
    balance = []
    for i in range(2, len(list1)-1):
        if sum(list1[:i]) == sum(list1[i+1:]):
            balance.append([i, list1[i]])
    return balance if len(balance) else None


l1 = [[1, 3, 5, 7, 8, 25, 4, 20, 29], [6, 5, 7, 9, 0, 5, 43, 2, 17, 13, 16], [2, 31, 43, 234, 0, 10, 15, 310, 37, 43, 21],
      [1, 3, 2, 546, 123, 546, 98, 543, 22, 424, 56, 23, 199, 934, 4], [1, 2, 4, 34, 54, 27, 49, 14, 36, 25, 68, 13, 35,
    78, 60, 25, 17, 5, 9, 23, 2, 1, 8, 1, 33, 26, 1, 9, 11, 5, 5, 253, 47, 65, 56, 10], [1, 2, 3, -3, 3, 2, 1]]

for i in l1:
    result = slice(i)
    if result is None:
        print("该列表无平衡点！")
    else:
        print("该列表有%d个平衡点，平衡点为：" % len(result))
        for s in result:
            print("  第%d个元素：%d。" % (s[0], s[1]))

结果：
该列表有1个平衡点，平衡点为：
  第6个元素：4。
该列表无平衡点！
该列表无平衡点！
该列表无平衡点！
该列表无平衡点！
该列表有3个平衡点，平衡点为：
  第2个元素：3。
  第3个元素：-3。
  第4个元素：3。

刘文华

哈哈

DavidCowboy

list1 = [1, 3, 5, 7, 8, 25, 4, 20, 29]
count = len(list1)//2
print(sum(list1[:count]))
print(sum(list1[count+1 :]))

if sum(list1[:count]) == sum(list1[count+1 :]):
    print('平衡點位置是：' , count)
else:
    print('None')

計算結果都沒有平衡點，而且第5個數組是36個，無法計算

foxiangzun

list1 = [1, 3, 5, 7, 8, 25, 4, 20, 29]
list2 = [6, 5, 7, 9, 0, 5, 43, 2, 17, 13, 16]
list3 = [2, 31, 43, 234, 0, 10, 15, 310, 37, 43, 21]
list4 = [1, 3, 2, 546, 123, 546, 98, 543, 22, 424, 56, 23, 199, 934, 4]
list5 = [1, 2, 4, 34, 54, 27, 49, 14, 36, 25, 68, 13, 35, 78, 60, 25, 17, 5, 9, 23, 2, 1, 8, 1, 33, 26, 1, 9, 11, 5, 5,
         253, 47, 65, 56, 10]

def getBalancePoint(list) :
        flag, flagCommon, flagPoint = 0, 0, 0
        for i in list :
                flagCommon += i
        for j in range(len(list) - 1) :
                flag += list[j]
                if flag == flagCommon - flag - list[j + 1] :
                        print('列表%s平衡点的下标为：%d\n平衡的的值为：%d\n' % (list, j + 1, list[j + 1]))
                        flagPoint += 1
        if flagPoint == 0 :
                print('该列表无平衡点')

getBalancePoint(list1)
getBalancePoint(list2)
getBalancePoint(list3)
getBalancePoint(list4)
getBalancePoint(list5)
[/code]

咕咕鸡鸽鸽

def fun152(list1):
    if not len(list1)%2:
        return False

    res = []
    for i in range(1,len(list1)):
        if sum(list1[:i]) == sum(list1[i+1:]):
            res.append(list1[i])
    if res:
        return res
    else:
        return None

小贤啊哦

def fun102(list1):
    for i in range(1,len(list1)):
        if sum(list1[:i])==sum(list1[i+1:]):
            print(list1[i])
        else:
            continue