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BAEKJOON_10816
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120 lines (93 loc) · 3.23 KB
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import java.io.*;
import java.sql.Array;
import java.util.*;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br =new BufferedReader(new InputStreamReader(System.in));
BufferedWriter bw =new BufferedWriter(new OutputStreamWriter(System.out));
int N = Integer.parseInt(br.readLine()); //숫자카드 N //상근이가 가지고 있는 카드
HashMap<Integer,Integer> map = new HashMap<>();
StringBuilder sb =new StringBuilder();
StringTokenizer st = new StringTokenizer(br.readLine());
int temp=0;
for(int i=0; i<N; i++){
temp = Integer.parseInt(st.nextToken());
if(!map.isEmpty() && map.containsKey(temp)){
map.replace(temp, map.get(temp)+1);
}else{
map.put(temp,1);
}
}
int M = Integer.parseInt(br.readLine()); //정수 M개
st =new StringTokenizer(br.readLine());
for(int i=0; i<M;i++){
temp = Integer.parseInt(st.nextToken());
if(map.containsKey(temp)){
sb.append(map.get(temp)+" ");
}else{
sb.append("0 ");
}
}
bw.write(sb.toString());
bw.flush();
bw.close();
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////////
상하한을 이용한 이분탐색
import java.io.*;
import java.util.*;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
//상근이
int N = Integer.parseInt(br.readLine());
int[] A = new int[N];
StringTokenizer st = new StringTokenizer(br.readLine());
for(int i=0; i<N; i++){
A[i] = Integer.parseInt(st.nextToken());
}
Arrays.sort(A);
int M = Integer.parseInt(br.readLine());
int[] B = new int[M];
st = new StringTokenizer(br.readLine());
for(int i=0; i<M; i++){
B[i] = Integer.parseInt(st.nextToken());
}
for(int i=0; i<M; i++){
int num = B[i];
int left = 0;
int right = A.length-1;
int LowerBound =0;
int UpperBound =0;
while(left <= right){
int mid = (left+right)/2;
if(A[mid]==num){
LowerBound=mid;
right = mid-1;
}else if(A[mid] > num){
right = mid-1;
}else{
left = mid+1;
}
}
left= 0;
right=A.length-1;
while(left <=right){
int mid = (left+right)/2;
if(A[mid]==num){
UpperBound= mid+1;
left = mid+1;
}else if(A[mid]>num){
right = mid-1;
}else{
left = mid+1;
}
}
bw.write(UpperBound-LowerBound+" ");
}
bw.flush();
bw.close();
}
}