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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