题解 | 简写单词

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        String s = in.nextLine();
        StringBuilder str = new StringBuilder();
        str.append(s.charAt(0));
        for(int i=0;i<s.length();i++){
            if(s.charAt(i)==' '){
                str.append(s.charAt(i+1));
            }
        }
        s = str.toString().toUpperCase();
        System.out.println(s);
    }
}