1. 程式人生 > >2018年貝殼網校招(秋招)演算法筆試程式設計題

2018年貝殼網校招(秋招)演算法筆試程式設計題

1、題目描述:

給定一個長度為N的序列A1到AN,求所有區間[L,R](1≤L≤R≤N)的極差之和,其中區間[L,R]的極差定義為AL到AR中的最大值與最小值之差。

思路:暴力求解,通過率36%

程式碼如下:

# -*- coding:utf-8 -*-
class Solution:
    # array 二維列表
    def Find(self, N, array):
        # write code here
        num = 0
        for i in range(N-1):
            for j in range(i+1,N):
                num += (max(array[i:j+1]) - min(array[i:j+1]))
        return num
while (True):
    try:
        n = input()
        array = input()
        N = int(n)
        arr = array.split(' ')
        for i in range(N):
            arr[i] = eval(arr[i])
        s = Solution()
        num = s.Find(N,arr)
        print(num)
    except:
        break

2、題目描述:

眾所周知,新款膝上型電腦都擁有自己的省電方案,現有某品牌膝上型電腦,正常工作狀態下耗電量為P1/min,當機主離開電腦T1min時,電腦進入螢幕保護狀態,耗電量為P2/min,當電腦進入屏保狀態T2min後,電腦進入睡眠狀態,耗電量為P3/min。

已知電腦主人的一天有n段時間在使用電腦工作,即[l1, r1], [l2, r2],…, [ln, rn],在[rn-1, ln]期間是沒有操作電腦的,問在[l1, rn]時間內,電腦共耗電多少瓦。、

思路:沒啥好說的,分段函式求解,通過率100%

程式碼如下:

# -*- coding:utf-8 -*-
class Solution:
    # array 二維列表
    def Find(self, arr, ran):
        # write code here
        n, p1, p2, p3, t1, t2  = arr[0],arr[1],arr[2],arr[3],arr[4],arr[5]
        num1 = s.ran_nei(ran,p1)
        num2 = s.ran_wai(ran, t1, t2, p1, p2, p3)
        return (num1+num2)
    def ran_nei(self,ran,p):
        score = 0
        for i in range(len(ran)):
            score += (ran[i][1] - ran[i][0])*p
        return score
    def ran_wai(self,ran,t1,t2,p1,p2,p3):
        score = 0
        for i in range(len(ran)-1):
            sub_ran = ran[i+1][0] - ran[i][1]
            if sub_ran <= t1:
                score += sub_ran*p1
            elif t1 < sub_ran <= (t2+t1):
                score += (t1*p1 + (sub_ran-t1)*p2)
            elif sub_ran > (t2+t1):
                score += (t1*p1 +t2*p2 + (sub_ran-t2-t1)*p3)
        return score

while (True):
    try:
        ran = []
        array = input()
        arr = array.split(' ')
        for i in range(len(arr)):
            arr[i] = eval(arr[i])
        for i in range(arr[0]):
            a = input()
            b = a.split(' ')
            c,d = eval(b[0]),eval(b[1])
            ran.append([c,d])
        s = Solution()
        num = s.Find(arr,ran)
        print(num)
    except:
        break

3、題目描述:

撲克牌分別為A23456789TJQK共13張牌

出牌規則如下:

單牌,對子,三帶至多一張牌,四帶至多兩張牌,連續至少五張為順子

輸入:一個長度為20的字串,例如‘8K67A65K27T59K346AK2’

輸出:至少多少輪能把手裡的牌出完

思路:暫時只想起將輸入的字串挨個放入健排序的字典中,對字典的健可以進行排序(找順子),以及每個健(對應牌值)底下有幾張牌(找四帶二,三帶一,對子,單牌),繼而算出至少多少輪出完

程式碼如下(暫時只實現字串讀取進字典):

# -*- coding:utf-8 -*-
class Solution:
    # array 二維列表
    def Find(self, array):
        # write code here
        return 4
while (True):
    try:
        dic = {}
        arr = input()
        print(arr)
        a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13 = [],[],[],[],[],[],[],[],[],[],[],[],[]
        for i in range(len(arr)):
            if arr[i] == 'A':
                a1.append(arr[i])
            elif arr[i] == '2':
                a2.append(arr[i])
            elif arr[i] == '3':
                a3.append(arr[i])
            elif arr[i] == '4':
                a4.append(arr[i])
            elif arr[i] == '5':
                a5.append(arr[i])
            elif arr[i] == '6':
                a6.append(arr[i])
            elif arr[i] == '7':
                a7.append(arr[i])
            elif arr[i] == '8':
                a8.append(arr[i])
            elif arr[i] == '9':
                a9.append(arr[i])
            elif arr[i] == 'T':
                a10.append(arr[i])
            elif arr[i] == 'J':
                a11.append(arr[i])
            elif arr[i] == 'Q':
                a12.append(arr[i])
            elif arr[i] == 'K':
                a13.append(arr[i])
        dic[1], dic[2], dic[3], dic[4], dic[5], dic[6], dic[7], dic[8], dic[9], dic[10], dic[11], dic[12], dic[13] = a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13
        s = Solution()
        num = s.Find(dic)
        print(num)
    except:
        break