leet-code/src/main/java/leetcode/editor/cn/FindTheDifference.java
2022-03-22 21:22:31 +08:00

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//给定两个字符串 s 和 t ,它们只包含小写字母。
//
// 字符串 t 由字符串 s 随机重排,然后在随机位置添加一个字母。
//
// 请找出在 t 中被添加的字母。
//
//
//
// 示例 1
//
//
//输入s = "abcd", t = "abcde"
//输出:"e"
//解释:'e' 是那个被添加的字母。
//
//
// 示例 2
//
//
//输入s = "", t = "y"
//输出:"y"
//
//
//
//
// 提示:
//
//
// 0 <= s.length <= 1000
// t.length == s.length + 1
// s 和 t 只包含小写字母
//
// Related Topics 位运算 哈希表 字符串 排序 👍 309 👎 0
package leetcode.editor.cn;
//389:找不同
public class FindTheDifference{
public static void main(String[] args) {
Solution solution = new FindTheDifference().new Solution();
}
//leetcode submit region begin(Prohibit modification and deletion)
class Solution {
public char findTheDifference(String s, String t) {
int[] chs = new int[26];
for (char ch:s.toCharArray()){
chs[ch-'a']++;
}
for (char ch:t.toCharArray()){
if(chs[ch-'a']==0){
return ch;
}
chs[ch-'a']--;
}
return 'a';
}
}
//leetcode submit region end(Prohibit modification and deletion)
}