Day 21

2022.11.29 开学倒计时67天

上午学不下去东西做了规划，

14：30-14：40补完了昨晚闭馆剩下的一条习题，

按计划14：40-15：40文学院教材（外国文学，20-25天读完），15：55-16：55文学院公开课《说文解字》（预计15天看完，附录音韵学需定夺），17：35-17：50名著-索福克勒斯悲剧

晚饭，19：10-20：10 python，20：10-20：50 leetcode

 7-1

car = input('what kind of car do you need?:')
print("let me see if i can find you a " + car)

 7-2

num = input('how many people will you come?:')
if int(num) > 8:
    print("no empty table")
else:
    print("welcome")

 7-3

num = input('input a number:')
if (int(num) % 10) == 0:
    print("it's mutiple of 10")
else:
    print("no")

 7-4

topping = ''
while topping != 'quit':
    topping = input('what you wanna add?:')
    if topping == 'quit':
        print('end')
    else:
        print('we will add: ' + topping)

 7-5

age = ''
flag = True
while age != 'quit':
    age = input('how old are you?:')
    if age == 'quit':
        flag = False
    if flag == False:
        print('end')
    else:
        age = int(age)
        if age < 3:
            print('you are free')
        elif ((age >= 3) & (age <= 12)):
            print('offer 10 dollar')
        elif age > 12:
            print('offer 15 dollar')

 7-6

active = True
age = ''
while active == True:
    age = input('how old are you?:')
    if age == 'quit':
        active = False
        print('end')
        break
    else:
        age = int(age)
        if age < 3:
            print('you are free')
        elif ((age >= 3) & (age <= 12)):
            print('offer 10 dollar')
        elif age > 12:
            print('offer 15 dollar')

7-7

age = ''
flag = True
while age != 'quit':
    age = input('how old are you?:')
    if age == 'quit':
        flag = False
    while flag == True:
        age = int(age)
        if age < 3:
            print('you are free')
        elif ((age >= 3) & (age <= 12)):
            print('offer 10 dollar')
        elif age > 12:
            print('offer 15 dollar')
    if flag == False:
        print('end')

leetcode

 2475. 数组中不等三元组的数目

暴力：

int unequalTriplets(int* nums, int numsSize){
    int first,second,third;
    int num = 0;
    for(int i = 0; i < numsSize - 2; i++){
        first = nums[i];
        for(int j = i + 1; j < numsSize - 1; j++){
            second = nums[j];
            for(int k = j + 1; k < numsSize; k++){
                third = nums[k];
                if((first != second) && (second != third) && (first != third)){
                    num++;
                }
            }
        }
    }
    return num;
}

 还有个哈希表的写法，看了半个小时才看懂，明天试试看能不能复刻