Can you solve this real interview question? Count Numbers with Unique Digits - Given an integer n, return the count of all numbers with unique digits, x, where 0 <= x < 10n. Example 1: Input: n = 2 Output: 91 Explanation: The answer should be the t
1classSolution2{3public:4intcount(intn,intx)5{6intcnt =0, k;7for(inti =1; k = n / i; i *=10)8{9inthigh = k /10;10if(x ==0)11{12if(high)13{14high--;15}16else17{18break;19}20}21cnt += high *i;22intcur = k %10;23if(cur >x)24{25cnt +=i;26}27elseif(c...
[Leetcode] Count and Say 数个数 Count Consecutive Digits in Integer Count consecutive digits and say it. For example, return 132341 if input is 1112224. There are three 1s, three 2s and one 4. 反转字符法 复杂度 时间O(N) 空间 O(1) 思路 因为数字不好从前向后遍历每一位(要先统计一共有...
2376. 统计特殊整数 - 如果一个正整数每一个数位都是 互不相同 的,我们称它是 特殊整数 。 给你一个 正 整数 n ,请你返回区间 [1, n] 之间特殊整数的数目。 示例 1: 输入:n = 20 输出:19 解释:1 到 20 之间所有整数除了 11 以外都是特殊整数。所以总共有 19 个
leetcode 之 Count Numbers with Unique Digits 题目描述Given a non-negative integer n, count all numbers with unique digits, x,where0≤ x <10n. Example: Given n=2,return91. (The answer should be the total numbersinthe range of0≤ x <100, excluding [11,22,33,44,55,66,77,88,99])...
题目链接:https://leetcode.com/problems/count-numbers-with-unique-digits/ 题目: Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10n. Example: Given n = 2, return 91. (The answer should be the total numbers in the range of 0 ≤ x < 100,...
Can you solve this real interview question? Count Number of Texts - Alice is texting Bob using her phone. The mapping of digits to letters is shown in the figure below. [https://assets.leetcode.com/uploads/2022/03/15/1200px-telephone-keypad2svg.png] In
LeetCode 357. Count Numbers with Unique Digits 简介:给定一个非负整数 n,计算各位数字都不同的数字 x 的个数,其中 0 ≤ x < 10n 。 Description Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10n....
leetcode 357. Count Numbers with Unique Digits 统计独特编码数组的数量 + 一个很简单的排列组合问题 Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10n. Example: Given n = 2, return 91. (The answer should be the total numbers in the range of ...
classSolution {public:intcountNumbersWithUniqueDigits(intn) {if(n ==0)return1;intres =0;for(inti =1; i <= n; ++i) {res+=count(i); }returnres; }intcount(intk) {if(k <1)return0;if(k ==1)return10;intres =1;for(inti =9; i >= (11- k); --i) { ...