NYOJ题目817英文藏头诗

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AC代码：

import java.util.Scanner;

public class Main {

public static void main(String[] args) {

Scanner sc=new Scanner(System.in);

int n=Integer.parseInt(sc.nextLine());

StringBuilder ans=new StringBuilder(n);
while(n-->0){
ans.append(sc.nextLine().charAt(0));
}
System.out.println(ans.toString());

}

}

题目来源： http://acm.nyist.net/JudgeOnline/problem.php?pid=817