Initially on a notepad only one character 'A' is present. You can perform two operations on this notepad for each step: Copy All: You can copy all the characters present on the notepad (partial copy is not allowed). Paste: You can paste the character…
Imagine you have a special keyboard with the following keys: Key 1: (A): Print one 'A' on screen. Key 2: (Ctrl-A): Select the whole screen. Key 3: (Ctrl-C): Copy selection to buffer. Key 4: (Ctrl-V): Print buffer on screen appending it after what has…
Initially on a notepad only one character 'A' is present. You can perform two operations on this notepad for each step: Copy All: You can copy all the characters present on the notepad (partial copy is not allowed). Paste: You can paste the character…
1. Longest Palindromic Substring Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. Example: Input: "babad" Output: "bab" Note: "aba" is also a valid answer. Ex…
原题链接在这里:https://leetcode.com/problems/4-keys-keyboard/description/ 题目: Imagine you have a special keyboard with the following keys: Key 1: (A): Print one 'A' on screen. Key 2: (Ctrl-A): Select the whole screen. Key 3: (Ctrl-C): Copy selection to buff…
解法一: 暴力DFS搜索,对每一步进行复制还是粘贴的状态进行遍历. 注意剪枝的地方: 1.当前A数量大于目标数量,停止搜索 2.当前剪贴板数字大于等于A数量时,只搜索下一步为粘贴的状态. Runtime: 8 ms, faster than 46.69% of C++ online submissions for 2 Keys Keyboard. class Solution { public: ; int resNum = INT_MAX; int minSteps(int n) { targ…
Initially on a notepad only one character 'A' is present. You can perform two operations on this notepad for each step: Copy All: You can copy all the characters present on the notepad (partial copy is not allowed). Paste: You can paste the character…
Imagine you have a special keyboard with the following keys: Key 1: (A): Print one 'A' on screen. Key 2: (Ctrl-A): Select the whole screen. Key 3: (Ctrl-C): Copy selection to buffer. Key 4: (Ctrl-V): Print buffer on screen appending it after what has…