所谓回文数 Palindrome Number,即从左边开始读或从右边开始读,两者结果一致。判断的目标数字为整数,包括负数。 比如12321,123321,或者 3,都是回文数。 -12321不是回文数;-1也不是回文数。 解法1. 简单解法:将整数转换为字符串 转换之后,Python有转换的 reverse 函数,将字符串进行反转:str[::-1]。 代码如下: ...
1. Using simple iteration These steps can be used in Python to determine whether a number is a palindrome or not using basic iteration: Utilize the str() function to transform the number into a string. Create two variables, ‘start’ and ‘end’, and set them to, respectively, point to...
print(is_palindrome_number1(num4)) print(is_palindrome_number1(num5)) print(is_palindrome_number1(num6))
判断一个整数是否是回文数。不可以用额外的空间 我的思路很简单。就是计算首和尾,检测是否相同 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 classSolution(object): defisPalindrome(self, x): ifx<0:returnFalse i,a=0,x whilea!=0: a=a/10 i+=1 first_i=10**(i-1)...
Given a number n, size of list then next line contains space separated n numbers.LogicWe will simply convert the number into string and then using reversed(string) predefined function in python ,we will check whether the reversed string is same as the number or not....
Palindrome Number (回文数) 题目Determine whether an integer is a palindrome. Do this without extra space. 什么是回文数 来源于百度百科:回文数 “回文”是指正读反读都能读通的句子,它是古今中外都有的一种修辞方式和文字游戏,如“我为人人,人人为我”等。在数学中也有这样一类数字有这样的特征,成为...
Check Palindrome String in Python Using Recursion Example # Define a function for palindrome check using recursiondefis_palindrome(s):iflen(s)<=1:returnTruereturns[0]==s[-1]andis_palindrome(s[1:-1])# Enter stringword=input()# Check if the string is a palindrome using recursionifis_palin...
# Python program to check if a string is # palindrome or not # function to check palindrome string def isPalindrome(string): rev_string = string[::-1] return string == rev_string # Main code x = "Google" if isPalindrome(x): print(x,"is a palindrome string") else: print(x,"is...
In this program, we have taken a string stored in my_str. Using the method casefold() we make it suitable for caseless comparisons. Basically, this method returns a lowercased version of the string. We reverse the string using the built-in function reversed(). Since this function returns ...
9. Palindrome Number 9. Palindrome Number 题目 题目解析:判断一个数字是不是回文数。 回文数的定义如下:一个数字和它倒置以后相等,则为回文数。 要求:无需额外的空间 要注意的几点就是:1)任何负数都不是回文数;2)注意倒置后溢出的判断;3)无需额外的空间消耗,也就是不能定义新的数据结构存储中间结果。