题解 | #记票统计#
记票统计
https://www.nowcoder.com/practice/3350d379a5d44054b219de7af6708894
思路：使用一个map集合存储候选人的姓名与投票数，程序要求按输入顺序输出结果，应该用LinkedHashMap，代码如下：
import java.util.*;
import java.io.*;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) throws IOException {
// Scanner in = new Scanner(System.in);
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String str;
// 注意 hasNext 和 hasNextLine 的区别
while ((str = br.readLine()) != null) { // 注意 while 处理多个 case
int n = Integer.parseInt(str);
String[] s = br.readLine().split(" ");
Map<String, Integer> candidate = new LinkedHashMap<>();
for (int i = 0; i < n; i++) {
candidate.put(s[i], 0);
}
int m = Integer.parseInt(br.readLine());
s = br.readLine().split(" ");
int Invalid = 0;
for (int i = 0; i < m; i++) {
if (candidate.containsKey(s[i])) {
int num = candidate.get(s[i]) + 1;
candidate.put(s[i], num);
}else Invalid++;
}
for (String key : candidate.keySet()) {
int value = candidate.get(key);
System.out.println(key + " : " + value);
}
System.out.println("Invalid" + " : " + Invalid);
}
}
}
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