统计同成绩学生(20)
【思路】Map键值对
import java.util.*;
public class Main{
public static void main(String args[]){
Scanner sc = new Scanner(System.in);
while(sc.hasNext()){
int n = sc.nextInt();
Map<Integer, Integer> map = new TreeMap<>();
for(int i=0; i<n; i++){
int k =sc.nextInt();
if(map.containsKey(k)){
map.put(k ,map.get(k)+1);
}else{
map.put(k ,1);
}
}
int num = sc.nextInt();
for(int i=0; i<num; i++){
int key = sc.nextInt();
if(map.containsKey(key)){
System.out.print(map.get(key));
}else{
System.out.print(0);
}
if( i != num-1){
System.out.print(" ");
}
}
}
}
}
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