15 lines
603 B
Java
15 lines
603 B
Java
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// [문제 링크]: https://school.programmers.co.kr/learn/courses/30/lessons/147354
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import java.util.*;
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import java.util.stream.*;
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class Solution {
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private int S_i(int[] a, int i) {return IntStream.of(a).mapToObj(b -> b%i).mapToInt(b->b).sum();}
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public int solution(int[][] data, int col, int row_begin, int row_end) {
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int answer = 0;
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List<int[]> al = Arrays.asList(data);
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al.sort((o1,o2) -> o2[0] - o1[0]);
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al.sort((o1,o2) -> o1[col-1] - o2[col-1]);
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for(int c = row_begin; c <= row_end; c++) answer ^= S_i(al.get(c-1),c);
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return answer;
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}
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}
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