拼多多笔试题python程序

第一题
import sys
str_list = [x for x in sys.stdin.readline().strip()]

K = int(len(str_list)/4)

for i in range(K+1):

    if (i == 0):

        j = 1

        line = str_list[0]

        while(j<=K):

            line = line + str_list[j]

            j = j+1

    if (i == K):

        j = 1

        line = str_list[3*K]

        while(j<=K):

            line = line+str_list[3*K-j]

            j=j+1

    if(i!=0 and i!=K):

        line = str_list[-i]

        for j in range(K-1):

            line = line + ' '

        line = line+str_list[K+i]

    print(line)

第二题

import sys



def panduan(lis):

    if(len(lis)==0):

        return 0

    count = 0

    if(len(lis)==1):

        count =count+1

    elif(lis[0] == 0 and lis[-1]==0):

        count = count

    elif(lis[0] == 0 and lis[-1]!=0):

        count=count+1

    elif(lis[0] != 0 and lis[-1] ==0):

        count=count+1

    else:

        count =count+len(lis)

    return count



num_list = [int(x) for x in sys.stdin.readline().strip()]

count = 0

for i in range(len(num_list)-1):

    list1 = num_list[0:i+1]

    list2 = num_list[i+1:]

    count1 = panduan(list1)

    count2 = panduan(list2)

    count = count+count1*count2

print(count)

 第三题       

import sys



list1 = sys.stdin.readline().strip().split()

N = int(list1[0])

M = int(list1[1])

li_total = []

for i in range(N):

    li = [int(x) for x in sys.stdin.readline().strip().split()]

    li_total.append(li)

Max_usr = 0

for i in range(N):

    count = 0

    if i == M:

        continue

    if i in li_total[M]:

        continue

    else:

        for j in li_total[M]:

            if j in li_total[i]:

                count = count + 1

    if(count>Max_usr):

        max_usr_id = i

        Max_usr = count

print(max_usr_id)



第四题

import sys



def find(list2):

    list_new = []

    for i in range(len(list2)):

        if i==0:

            if list2[i]==list2[i+1]:

                list_new.append(list2[i])

        if i>=1 and i<len(list2)-1:

            if list2[i]>=list2[i-1] and list2[i]>=list2[i+1]:

                list_new.append(list2[i])

        if i==len(list2)-1:

            if list2[i]==list2[i-1]:

                list_new.append(list2[i])

    return list_new

if __name__=="__main__":

    list1 = sys.stdin.readline().strip()

    num = int(list1)

    list2 = [int(x) for x in sys.stdin.readline().strip().split()]

    count = 1

    while True:

        list_new= find(list2)

        if (len(list_new)>1):

            count = count+1

            list2 = list_new

        elif(len(list_new)==1):

            count = count+1

            break;

        else:

            break

        

    print(count)