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Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 代码如下: public class Solution { public int reverse(int n) { long sum=0; int flag=1; if(n<0) { flag=-1; n=n*(-1); } try{ String s=Integer.toString(n); s=new Strin…
public class Solution { public int reverse(int x) { StringBuffer sb = new StringBuffer(x+"").reverse(); if(sb.charAt(sb.length()-1)=='-') { sb=new StringBuffer(sb.substring(0,sb.length()-1)); } int res=0; try { res= Integer.parseInt(sb.toString(…
public int reverse(int x) { long res = 0; while (x != 0){ res = res* 10 + x % 10; x /= 10; } if(res >= Integer.MAX_VALUE || res < Integer.MIN_VALUE) return 0; return (int)res; }…
Reverse Integer Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321 time=272ms accepted public class Solution { public int reverse(int x) { long recv=0; int mod=0; int xabs=Math.abs(x); while(xabs>0){ mod=xabs%…
题目:Reverse Integer 难度:Easy 题目内容: Given a 32-bit signed integer, reverse digits of an integer. Note:Assume we are dealing with an environment which could only hold integers within the 32-bit signed integer range. For the purpose of this problem, assum…
题目来源:https://leetcode.com/problems/reverse-integer/ Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 解题思路: 其实这道题看起来非常简单,要实现也是几行代码的事.但是有个小问题容易被忽略,就是边界问题.什么意思呢?如果我们输入的整数超出了int的表达范围,这个问题要怎么解决呢? 用比int更大的数据类型存储我们转…
题目: Reverse digits of an integer. Example1: x = , return Example2: x = -, return - 思路:递归 解答: / test cases passed. Status: Accepted Runtime: ms Submitted: minutes ago 这个方法比较糟糕,时间太长用到递归但又没利用函数的返回值,中间还需要借助字符串过渡. public class Solution { StringBuilder res…
Reverse Integer Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 若反转的数溢出,直接返回0 可以用计算结果来判断溢出,也可以用因数来判断 Java代码实现: public class ReverseInteger { public static int reverseInt(int x){ if (x == 0) { return 0; } int…
7.Reverse Integer Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: Output: Example 2: Input: - Output: - Example 3: Input: Output: Note:Assume we are dealing with an environment which could only hold integers within the…
Reverse Integer Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 click to show spoilers. SOLUTION 1: 注意越界后返回0.先用long来计算,然后,把越界的处理掉. public class Solution { public int reverse(int x) { long ret = 0; while (x !…