AcWing 772. 只出现一次的字符
原题链接
中等
作者:
Ladwyl
,
2024-04-10 16:09:10
,
所有人可见
,
阅读 1
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String str = sc.next();
int[] cnt = new int [26];
for (int i = 0; i <str.length(); i ++ ) {
int t = str.charAt(i) - 'a';
cnt[t] ++;
}
for (int i = 0; i < str.length(); i ++ ) {
int t = str.charAt(i) - 'a';
if (cnt[t] == 1) {
System.out.println(str.charAt(i));
return;
}
}
System.out.println("no");
}
}