PKU 1552 "Doubles"

問題：http://acm.pku.edu.cn/JudgeOnline/problem?id=1552
順位：http://acm.pku.edu.cn/JudgeOnline/problemstatus?problem_id=1552&orderby=clen&language=2
提出コード(215B)

import java.util.*;class Main{static{Scanner s=new Scanner(System.in);for(int n,c;(n=s.nextInt())>0;){Set l=new HashSet();c=0;do{l.add(n);l.add(n*2);++c;}while((n=s.nextInt())>0);System.out.println(2*c-l.size());}}}

整形コード

class Main {
	static {
		Scanner s = new Scanner(System.in);
		for (int n, c; (n = s.nextInt()) > 0;) {
			Set l = new HashSet();
			c = 0;
			do {
				l.add(n);
				l.add(n * 2);
				++c;
			} while ((n = s.nextInt()) > 0);
			System.out.println(2 * c - l.size());
		}
	}
}