Hard 找到由其它单词组成的最长单词 @CareerCup

输入一行字符,输出最长的单词 1、确定单词分隔符,一般情况为空格和标点符号,根据题目情况来确定标点符号是否算在单词中。 假定单词不包括标点符号,即全由字母组成 2、根据上面的特点,读取一个单词 3、计算单词长度 4、与当前最大单词长度max(初值为0)比较,如果大于max,则记录下当前单词,并将其长度赋值给max 5、重复2-4,直到读单词结束(到字符串尾)。 6、输出最长单词长度和单词 #include<... 阅读详情

用DFS的那个模板就能做出来,值得注意的是一个词必须被除自己外的其他词组成才行,不能是自己组成自己。


package Hard;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;

import CtCILibrary.AssortedMethods;


/**
 * Write a program to find the longest word made of other words.

译文:

写一个程序,找到由其它单词组成的最长单词。
 *
 */
public class S18_7 {

	static class LengthComparator implements Comparator<String> {
		public int compare(String o1, String o2) {
			return o2.length() - o1.length();		// 从长到短排序
		}
	}

	public static String printLongestWord(String arr[]) {
		HashMap<String, Boolean> map = new HashMap<String, Boolean>();
		for (String str : arr) {
			map.put(str, true);
		}
		Arrays.sort(arr, new LengthComparator()); // Sort by length
		
		for (String s : arr) {
			if (canBuildWord(s, true, map)) {
				System.out.println(s);
				return s;
			}
		}
		return "";
	}

	// DFS深搜
	public static boolean canBuildWord(String str, boolean isOriginalWord, HashMap<String, Boolean> map) {
		if (map.containsKey(str) && !isOriginalWord) {		// 一个词只能由其他词组成,自己不能组成自己!
			return map.get(str);
		}
		for (int i = 1; i < str.length(); i++) {
			String left = str.substring(0, i);
			String right = str.substring(i);
			if (map.containsKey(left) && map.get(left) == true && canBuildWord(right, false, map)) {
				return true;
			}
		}
		map.put(str, false);		// 记录str不能被其他的单词表示,如果以后再遇到str就可以不继续找了
		return false;
	}

	public static void main(String[] args) {
		String[] arr = createGiantArray();
		printLongestWord(arr);
	}

	public static String[] createGiantArray() {
		String arr[] = { "a", "able", "about", "account", "acid", "across",
				"act", "addition", "adjustment", "advertisement", "after",
				"again", "against", "agreement", "air", "all", "almost",
				"among", "amount", "amusement", "and", "angle", "angry",
				"animal", "answer", "ant", "any", "apparatus", "apple",
				"approval", "arch", "argument", "arm", "army", "art", "as",
				"at", "attack", "attempt", "attention", "attraction",
				"authority", "automatic", "awake", "baby", "back", "bad",
				"bag", "balance", "ball", "band", "base", "basin", "basket",
				"bath", "be", "beautiful", "because", "bed", "bee", "before",
				"behaviour", "belief", "bell", "bent", "berry", "between",
				"bird", "birth", "bit", "bite", "bitter", "black", "blade",
				"blood", "blow", "blue", "board", "boat", "body", "boiling",
				"bone", "book", "boot", "bottle", "box", "boy", "brain",
				"brake", "branch", "brass", "bread", "breath", "brick",
				"bridge", "bright", "broken", "brother", "brown", "brush",
				"bucket", "building", "bulb", "burn", "burst", "business",
				"but", "butter", "button", "by", "cake", "camera", "canvas",
				"card", "care", "carriage", "cart", "cat", "cause", "certain",
				"chain", "chalk", "chance", "change", "cheap", "cheese",
				"chemical", "chest", "chief", "chin", "church", "circle",
				"clean", "clear", "clock", "cloth", "cloud", "coal", "coat",
				"cold", "collar", "colour", "comb", "come", "comfort",
				"committee", "common", "company", "comparison", "competition",
				"complete", "complex", "condition", "connection", "conscious",
				"control", "cook", "copper", "copy", "cord", "cork", "cotton",
				"cough", "country", "cover", "cow", "crack", "credit", "crime",
				"cruel", "crush", "cry", "cup", "cup", "current", "curtain",
				"curve", "cushion", "damage", "danger", "dark", "daughter",
				"day", "dead", "dear", "death", "debt", "decision", "deep",
				"degree", "delicate", "dependent", "design", "desire",
				"destruction", "detail", "development", "different",
				"digestion", "direction", "dirty", "discovery", "discussion",
				"disease", "disgust", "distance", "distribution", "division",
				"do", "dog", "door", "doubt", "down", "drain", "drawer",
				"dress", "drink", "driving", "drop", "dry", "dust", "ear",
				"early", "earth", "east", "edge", "education", "effect", "egg",
				"elastic", "electric", "end", "engine", "enough", "equal",
				"error", "even", "event", "ever", "every", "example",
				"exchange", "existence", "expansion", "experience", "expert",
				"eye", "face", "fact", "fall", "FALSE", "family", "far",
				"farm", "fat", "father", "fear", "feather", "feeble",
				"feeling", "female", "fertile", "fiction", "field", "fight",
				"finger", "fire", "first", "fish", "fixed", "flag", "flame",
				"flat", "flight", "floor", "flower", "fly", "fold", "food",
				"foolish", "foot", "for", "force", "fork", "form", "forward",
				"fowl", "frame", "free", "frequent", "friend", "from", "front",
				"fruit", "full", "future", "garden", "general", "get", "girl",
				"give", "glass", "glove", "go", "goat", "gold", "good",
				"government", "grain", "grass", "great", "green", "grey",
				"grip", "group", "growth", "guide", "gun", "hair", "hammer",
				"hand", "hanging", "happy", "harbour", "hard", "harmony",
				"hat", "hate", "have", "he", "head", "healthy", "hear",
				"hearing", "heart", "heat", "help", "high", "history", "hole",
				"hollow", "hook", "hope", "horn", "horse", "hospital", "hour",
				"house", "how", "humour", "I", "ice", "idea", "if", "ill",
				"important", "impulse", "in", "increase", "industry", "ink",
				"insect", "instrument", "insurance", "interest", "invention",
				"iron", "island", "jelly", "jewel", "join", "journey", "judge",
				"jump", "keep", "kettle", "key", "kick", "kind", "kiss",
				"knee", "knife", "knot", "knowledge", "land", "language",
				"last", "late", "laugh", "law", "lead", "leaf", "learning",
				"leather", "left", "leg", "let", "letter", "level", "library",
				"lift", "light", "like", "limit", "line", "linen", "lip",
				"liquid", "list", "little", "living", "lock", "long", "look",
				"loose", "loss", "loud", "love", "low", "machine", "make",
				"male", "man", "manager", "map", "mark", "market", "married",
				"mass", "match", "material", "may", "meal", "measure", "meat",
				"medical", "meeting", "memory", "metal", "middle", "military",
				"milk", "mind", "mine", "minute", "mist", "mixed", "money",
				"monkey", "month", "moon", "morning", "mother", "motion",
				"mountain", "mouth", "move", "much", "muscle", "music", "nail",
				"name", "narrow", "nation", "natural", "near", "necessary",
				"neck", "need", "needle", "nerve", "net", "new", "news",
				"night", "no", "noise", "normal", "north", "nose", "not",
				"note", "now", "number", "nut", "observation", "of", "off",
				"offer", "office", "oil", "old", "on", "only", "open",
				"operation", "opinion", "opposite", "or", "orange", "order",
				"organization", "ornament", "other", "out", "oven", "over",
				"owner", "page", "pain", "paint", "paper", "parallel",
				"parcel", "part", "past", "paste", "payment", "peace", "pen",
				"pencil", "person", "physical", "picture", "pig", "pin",
				"pipe", "place", "plane", "plant", "plate", "play", "please",
				"pleasure", "plough", "pocket", "point", "poison", "polish",
				"political", "poor", "porter", "position", "possible", "pot",
				"potato", "powder", "power", "present", "price", "print",
				"prison", "private", "probable", "process", "produce",
				"profit", "property", "prose", "protest", "public", "pull",
				"pump", "punishment", "purpose", "push", "put", "quality",
				"question", "quick", "quiet", "quite", "rail", "rain", "range",
				"rat", "rate", "ray", "reaction", "reading", "ready", "reason",
				"receipt", "record", "red", "regret", "regular", "relation",
				"religion", "representative", "request", "respect",
				"responsible", "rest", "reward", "rhythm", "rice", "right",
				"ring", "river", "road", "rod", "roll", "roof", "room", "root",
				"rough", "round", "rub", "rule", "run", "sad", "safe", "sail",
				"salt", "same", "sand", "say", "scale", "school", "science",
				"scissors", "screw", "sea", "seat", "second", "secret",
				"secretary", "see", "seed", "seem", "selection", "self",
				"send", "sense", "separate", "serious", "servant", "sex",
				"shade", "shake", "shame", "sharp", "sheep", "shelf", "ship",
				"shirt", "shock", "shoe", "short", "shut", "side", "sign",
				"silk", "silver", "simple", "sister", "size", "skin", "skirt",
				"sky", "sleep", "slip", "slope", "slow", "small", "smash",
				"smell", "smile", "smoke", "smooth", "snake", "sneeze", "snow",
				"so", "soap", "society", "sock", "soft", "solid", "some", "",
				"son", "song", "sort", "sound", "soup", "south", "space",
				"spade", "special", "sponge", "spoon", "spring", "square",
				"stage", "stamp", "star", "start", "statement", "station",
				"steam", "steel", "stem", "step", "stick", "sticky", "stiff",
				"still", "stitch", "stocking", "stomach", "stone", "stop",
				"store", "story", "straight", "strange", "street", "stretch",
				"strong", "structure", "substance", "such", "sudden", "sugar",
				"suggestion", "summer", "sun", "support", "surprise", "sweet",
				"swim", "system", "table", "tail", "take", "talk", "tall",
				"taste", "tax", "teaching", "tendency", "test", "than", "that",
				"the", "then", "theory", "there", "thick", "thin", "thing",
				"this", "thought", "thread", "throat", "through", "through",
				"thumb", "thunder", "ticket", "tight", "till", "time", "tin",
				"tired", "to", "toe", "together", "tomorrow", "tongue",
				"tooth", "top", "touch", "town", "trade", "train", "transport",
				"tray", "tree", "trick", "trouble", "trousers", "TRUE", "turn",
				"twist", "umbrella", "under", "unit", "up", "use", "value",
				"verse", "very", "vessel", "view", "violent", "voice",
				"waiting", "walk", "wall", "war", "warm", "wash", "waste",
				"watch", "water", "wave", "wax", "way", "weather", "week",
				"weight", "well", "west", "wet", "wheel", "when", "where",
				"while", "whip", "whistle", "white", "who", "why", "wide",
				"will", "wind", "window", "wine", "wing", "winter", "wire",
				"wise", "with", "woman", "wood", "wool", "word", "work",
				"worm", "wound", "writing", "wrong", "year", "yellow", "yes",
				"yesterday", "you", "young" };

		return arr;

		/*
		 * To see performance on a larger array, comment / delete the above
		 * "return arr;" line and uncomment the below code. This will create a
		 * giant array by concatenating words from the above list.
		 */

//		ArrayList<String> list = new ArrayList<String>();
//		for (int i = 0; i < arr.length; i++) {
//			int n = AssortedMethods.randomIntInRange(0, 1000);
//			String s = arr[i];
//			for (int j = 0; j < n; j++) {
//				int index = AssortedMethods.randomIntInRange(0, i);
//				s += arr[index];
//			}
//			list.add(s);
//			list.add(arr[i]);
//		}
//		String[] ar = new String[list.size()];
//		for (int i = 0; i < list.size(); i++) {
//			ar[i] = list.get(i);
//		}
//		return ar;

	}
}


最长单词 问题描述: 对于输入的一个英文语句(单词以空格分隔)。输出其中是长的单词及其长度。 输入样例: I love China. 输出样例: China 5 分析: 代码: 字符数组 #include <iostream> using namespace std; int main(){ char ans[200],txt[200]; int len=0,ntxt=0,tmp=0; w... 阅读详情

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题目描述: 找出长度最长的单词(不同长度的单词只出现一次)。 输入格式: 输入格式为单行形式,单词之间使用空格分割。 输出格式: 输出格式为长度最长的一个单词。 输入样例: 在这里给出一组输入。例如: an not need happy suggest 输出样例: 在这里给出相应的输出。例如: suggest 代码块: import java.util.Scanner; public class LogestWord { public static void main(String[] args)

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efm32 入门.pdf

本PDF共计22页,介绍的是操作驱动API,下载与否自己斟酌。

careercup-高等难度 18.7

18.7 给定一组单词,编写一个程序,找出其中的最长单词,且该单词由这组单词中的其他单词组合而成。 解法: 原题 给定字符串,以及一个字典,判断字符串是否能够拆分为字段中的单词。例如,字段为{hello,world},字符串为hellohelloworld,则可以拆分为hello,hello,world,都是字典中的单词。 分析 这个题目唤作“分词问题”,略显宽泛。只是想提及这个问题,这...

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C# WinForm 基于DirectShow.dll编写的程序,可边预览边保存视频,音频和图片

基于微软的DirectShow.dll的二次开发1.自动识别连接的摄像头跟麦克风且可以对其进行选择(默认选中第一个)2.可录制wmv和avi两种格式的视频并且都带有音频,avi可以录制的分辨率和帧数进行选择,wmv默认进行了淸晰度优化如不喜欢可去除代码中有相关提示3.可在预览点开之后进行拍照,也可边录制视频边拍照4.添加了视频和音频的压缩功能(酌情使用)这次二次开发发现C#对DirectShow的相关信息太少,这次做完也不敢藏私共享出来,还望大家指正

C //习题 7.10 写一个函数,输入一行字符,将此字符串中最长的单词输出。

【代码】C //习题 7.10 写一个函数,输入一行字符,将此字符串中最长的单词输出。

Made in Code 6万+

字符串篇(python)—如何找到由其他单词组成的最长单词

如何找到由其他单词组成的最长单词 给定一个字符串数组 找出数组中最长的字符串 使其能由数组中其他的字符串组成 例如给定字符串数组 [“test”,“tester”,“testertest”,“testing”,“apple”,“seattle”,“banana”,“batting”,“ngcat”,“batti”,“bat”,“testingtester”,“testbattingcat”] 满足要求的字符串 testbattingcat 组成的字符串 test batti ngcat class L

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720. 词典中最长的单词

给出一个字符串数组words组成的一本英语词典。从中找出最长的一个单词,该单词是由words词典中其他单词逐步添加一个字母组成。若其中有多个可行的答案,则返回答案中字典序最小的单词。 若无答案,则返回空字符串。 示例 1: 输入: words = ["w","wo","wor","worl", "world"] 输出: "world" 解释: 单词"world"可由"w", "wo", "wor...

weixin_42488905的博客 295

LintCode 题目:最长单词

URL:https://www.lintcode.com/problem/longest-word/description 描述 给一个词典,找出其中所有最长的单词。 样例 样例 1: 输入: { "dog", "google", "facebook", "internationalization", "blabla" } 输出: ["internatio...

分享包括但不限于计算机基础知识、数据结构与算法、Golang技术栈。年与时驰,意与日去,遂成枯落,多不接世,悲守穷庐,将复何及! 2219

蓝桥杯ADV-78 VIP试题 最长单词(试题解析)

试题 算法提高 最长单词 提交此题评测记录 资源限制 时间限制:1.0s 内存限制:512.0MB   编写一个函数,输入一行字符,将此字符串中最长的单词输出。   输入仅一行,多个单词,每个单词间用一个空格隔开。单词仅由小写字母组成。所有单词的长度和不超过100000。如有多个最长单词,输出最先出现的。 样例输入 I am a student 样例输出 student 解题思路:模拟。 AC代码如下: #include <iostream> #include...

Sgappti的博客 435

leetcode 720 词典中最长的单词 给出一个字符串数组words组成的一本英语词典。从中找出最长的一个单词,该单词是由words词典中其他单词逐步添加一个字母组成。若其中有多个可行的答案,则返

题目描述:         给出一个字符串数组words组成的一本英语词典。从中找出最长的一个单词,该单词是由words词典中其他单词逐步添加一个字母组成。若其中有多个可行的答案,则返回答案中字典序最小的单词。 若无答案,则返回空字符串。 示例 1: 输入: words = ["w","wo","wor","worl", "world"] 输出: "world" 解释: 单

fu_bobo 2691

算法12-----词典中最长的单词

1、题目 给出一个字符串数组words组成的一本英语词典。从中找出最长的一个单词,该单词是由words词典中其他单词逐步添加一个字母组成。若其中有多个可行的答案,则返回答案中字典序最小的单词。 若无答案,则返回空字符串。 示例 1: 输入: words = ["w","wo","wor","worl", "world"] 输出: "world" 解释: 单词"world"可由"...

weixin_34344403的博客 209

dfs时间复杂度_两道有意思的时间复杂度计算

第一题 Leetcode 395Loading...​leetcode.comFind the length of the longest substring T of a given string (consists of lowercase letters only) such that every character in T appears no less than k times.Exa...

weixin_40007668的博客 442

找出最长的一个单词

还是那位大神~ https://coderbyte.com/results/hyuil:Longest%20Word:Cpp #include #include #include using namespace std; string LongestWord(string sen) { // code goes here string sen2 = ""; f

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