题解 | #浮点数的个位数字#

import java.util.Scanner;
public class Main {
    
    public static void main(String[] args) {
        
        Scanner sc = new Scanner(System.in);
        String str = sc.next();
        for(int i = 0 ; i < str.length() ; i++) {
            if(str.charAt(i) == '.') {
                System.out.println(str.charAt(i - 1));
                break;
            }
        }
    }
}