11651번 문제 : 좌표정렬 2

java

닫기 줄바꿈

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.Comparator;
import java.util.StringTokenizer;

class MainApp{
‌public static void main(String[] args) throws IOException {
‌‌BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
‌‌
‌‌int num = Integer.parseInt(br.readLine());
‌‌int co[][] = new int[num][2];
‌‌
‌‌StringTokenizer st ;
‌‌for(int i=0;i<num;i++) {
‌‌‌st = new StringTokenizer(br.readLine());
‌‌‌co[i][0] = Integer.parseInt(st.nextToken());
‌‌‌co[i][1] = Integer.parseInt(st.nextToken());
‌‌}
‌‌Arrays.sort(co,(a1,a2) -> {
‌‌‌‌if(a1[1] == a2[1]) {
‌‌‌‌‌return a1[0]-a2[0]; 
‌‌‌‌}
‌‌‌return a1[1]-a2[1];
‌‌});
‌‌StringBuilder sb = new StringBuilder();
‌‌for(int i=0;i<num;i++) {
‌‌‌sb.append(co[i][0]+" "+co[i][1]).append("\n");
‌‌}
‌‌System.out.println(sb);
‌}
‌
}

익힌걸로 완벽하게 해부렸다 !