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Copy path1528.重新排列字符串.cs
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1528.重新排列字符串.cs
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using System.Text;
/*
* @lc app=leetcode.cn id=1528 lang=csharp
*
* [1528] 重新排列字符串
*
* https://leetcode.cn/problems/shuffle-string/description/
*
* algorithms
* Easy (78.62%)
* Likes: 43
* Dislikes: 0
* Total Accepted: 33.7K
* Total Submissions: 42.8K
* Testcase Example: '"codeleet"\n[4,5,6,7,0,2,1,3]'
*
* 给你一个字符串 s 和一个 长度相同 的整数数组 indices 。
*
* 请你重新排列字符串 s ,其中第 i 个字符需要移动到 indices[i] 指示的位置。
*
* 返回重新排列后的字符串。
*
*
*
* 示例 1:
*
*
*
*
* 输入:s = "codeleet", indices = [4,5,6,7,0,2,1,3]
* 输出:"leetcode"
* 解释:如图所示,"codeleet" 重新排列后变为 "leetcode" 。
*
*
* 示例 2:
*
*
* 输入:s = "abc", indices = [0,1,2]
* 输出:"abc"
* 解释:重新排列后,每个字符都还留在原来的位置上。
*
*
*
*
* 提示:
*
*
* s.length == indices.length == n
* 1 <= n <= 100
* s 仅包含小写英文字母
* 0 <= indices[i] < n
* indices 的所有的值都是 唯一 的
*
*
*/
// @lc code=start
public class Solution {
// 33 57; 14 100; 100 95;
public string RestoreString(string s, int[] indices) {
int size = s.Length;
var sb = new StringBuilder(size);
int i = 0;
for(; i < size; ++i){
// sb[i] = (char)(s[i] - 32); // 错误
sb.Append((char)(s[i] - 32)); // 先转为大写
}
int count = 0;
i = 0;
char pre = (char)(sb[i]+32), tmp;
while(count < size){
// a 97 A 65
if(sb[indices[i]] >= 97){
i = (i+1) % size;
pre = (char)(sb[i]+32);
continue;
}
tmp = (char)(sb[indices[i]] + 32);
sb[indices[i]] = pre;
i = indices[i];
pre = tmp;
++count;
}
return sb.ToString();
}
// 100 81;
public string RestoreString1(string s, int[] indices) {
int size = s.Length;
var sb = new StringBuilder(size);
sb.Insert(0, "A", size);
// Console.WriteLine($"{sb.ToString()}");
for(int i = 0; i < size; ++i){
sb[indices[i]] = s[i];
}
return sb.ToString();
}
}
// @lc code=end