[LeetCode] 423 Reconstruct Original Digits from English
Given a non-empty string containing an out-of-order English representation of digits 0-9
, output the digits in ascending order.
Note:
- Input contains only lowercase English letters.
- Input is guaranteed to be valid and can be transformed to its original digits. That means invalid inputs such as "abc" or "zerone" are not permitted.
- Input length is less than 50,000.
Example 1:
Input: "owoztneoer" Output: "012"
Example 2:
Input: "fviefuro" Output: "45"
解法:原来的字符串是乱序的,当遇到一个字母 e 的时候,并没有办法知道这个字符是属于 one、three、nine等中的一个。但是当遇到一个 z 的时候,肯定
是可以确定这个字符是属于 zero 的,因为z只出现在zero中,同理,x 也只出现在six中。
那么这就是一个优先级的问题,应该优先匹配那些属于少数数字的字符,例如优先寻找z,如果出现一个z,那么必须相应的出现e、r、o。如果字符串里面已经没有z了,
那么这个时候如果还出现了r,那么这个 r 就只可能属于 three、four中的一个了,依次类推,就能得到解法。
for (char c : s.toCharArray()) {
count[c]++;
}
int[] res = new int[10];
char[] idx = {'z', 'x', 's', 'v', 'f', 'r', 'w', 'g', 'o', 'i'};
//char[] idx = {'z', 'x', 's', 'v', 'f', 'r', 'w', 'g', 'o', 'i'};
for (char i : idx) {
while (count[i] > 0) {
switch (i) {
case 'z': //匹配z,减去zero
res[0]++;
count['z']--;
count['e']--;
count['r']--;
count['o']--;
break;
case 'x': //匹配six,减去six
res[6]++;
count['s']--;
count['i']--;
count['x']--;
break;
case 's': //匹配seven,因为之前优先匹配了six,如果这个时候,还有多余的s,那么肯定是seven
res[7]++;
count['s']--;
count['e']--;
count['v']--;
count['e']--;
count['n']--;
break;
case 'v': //匹配five,因为之前优先匹配了seven,如果这个时候还出现v,那么肯定是属于five
res[5]++;
count['f']--;
count['i']--;
count['v']--;
count['e']--;
break;
case 'f': //匹配four,因为之前匹配了four,那么这个时候还出现f,那么肯定属于four
res[4]++;
count['f']--;
count['o']--;
count['u']--;
count['r']--;
break;
case 'r': //匹配three,因为之前匹配了four,还出现three,肯定属于three
res[3]++;
count['t']--;
count['h']--;
count['r']--;
count['e']--;
count['e']--;
break;
case 'w':
res[2]++;
count['t']--;
count['w']--;
count['o']--;
break;
case 'g':
res[8]++;
count['e']--;
count['i']--;
count['g']--;
count['h']--;
count['t']--;
break;
case 'o':
res[1]++;
count['o']--;
count['n']--;
count['e']--;
break;
case 'i':
res[9]++;
count['n']--;
count['i']--;
count['n']--;
count['e']--;
break;
default:
break;
}
}
}
//System.out.print(res[0]);
StringBuilder sb = new StringBuilder();
for (int i = 0; i <= 9; i++) {
for (int j = 0; j < res[i]; j++) {
sb.append(i);
}
}
return sb.toString();
}
[LeetCode] 423 Reconstruct Original Digits from English的更多相关文章
- LeetCode 423. Reconstruct Original Digits from English——学会观察,贪心思路
Given a non-empty string containing an out-of-order English representation of digits 0-9, output the ...
- 【LeetCode】423. Reconstruct Original Digits from English 解题报告(Python)
[LeetCode]423. Reconstruct Original Digits from English 解题报告(Python) 标签: LeetCode 题目地址:https://leetc ...
- 【LeetCode】423. Reconstruct Original Digits from English
Given a non-empty string containing an out-of-order English representation of digits 0-9, output the ...
- 423. Reconstruct Original Digits from English (leetcode)
Given a non-empty string containing an out-of-order English representation of digits 0-9, output the ...
- 423. Reconstruct Original Digits from English(Medium)
Given a non-empty string containing an out-of-order English representation of digits 0-9, output the ...
- 423 Reconstruct Original Digits from English 从英文中重建数字
给定一个非空字符串,其中包含字母顺序打乱的英文单词表示的数字0-9.按升序输出原始的数字.注意: 输入只包含小写英文字母. 输入保证合法并可以转换为原始的数字,这意味着像 "ab ...
- 423. Reconstruct Original Digits from English
这个题做得突出一个蠢字.. 思路就是看unique letter,因为题里说肯定是valid string.. 一开始有几个Z就有几个ZERO 同样的还有x for six, g for eight, ...
- [LeetCode] Reconstruct Original Digits from English 从英文中重建数字
Given a non-empty string containing an out-of-order English representation of digits 0-9, output the ...
- Leetcode: Reconstruct Original Digits from English
Given a non-empty string containing an out-of-order English representation of digits 0-9, output the ...
随机推荐
- api服务端接口安全
api服务端接口安全性解析 http://blog.csdn.net/tenfyguo/article/details/8225279 常用的基于token的实现方案 http://blog.csdn ...
- jquery实现淡入淡出
fade方法包括四个: (1)fadeIn(speed,callback):淡入的方法,speed代表淡入的速度,可以是slow,fast,毫秒,不填等 例如: $(document).ready(f ...
- fedora23 tweak tool不工作解决方案
在启动器中打开 优化工具 失败 在终端中开启显示 Traceback (most recent call last): File "/usr/bin/gnome-tweak-tool&quo ...
- LLVM example for main
#include "llvm/IR/CallSite.h" #include "llvm/IR/Instruction.h" #include "ll ...
- Oracle重启 error: ora-01034:oracle not available ora-27101:shared memory realm does not exist
error: ora-01034:oracle not available ora-27101:shared memory realm does not exist 苦咖啡 他的博客中一篇文章完美的解 ...
- 炼数成金(dataguru)IT技能修炼
2016我定的目标就是要走出舒适区,进入学习区!为了少走弯路,节约学习的成本和时间,我选择了dataguru.看到心仪的课程毫不犹豫的就报了名. 分享了炼数成金邀请码,使用邀请码报名课程可以减免50% ...
- 一个无缝滚动的jquery插件
$.fn.imgscroll = function(o){ var defaults = { speed: 40, amount: 0, width: 1, dir: "left" ...
- ActionBarSherlock环境搭建
1.在官网http://actionbarsherlock.com/下载ActionBarSherlock包解压到. 2.创建自己的Android工程: 3.File -> New -> ...
- [linux] 结构化命令-for
1 for命令 # for:迭代循环:默认空格为分隔符 for var in list do commands done 1.1 读取列表中的值 #!usr/bin/bash for test in ...
- 获取当前运行dll文件的路径
char moduledir[MAX_PATH]; GetModuleFileNameA(GetModuleHandleA("ppdl_BE081_BIW_seal_library.dll ...