updated at 2022. 12. 30. 오후 7:02:22

2022-12-30 19:02:21 +09:00
parent ae9b4b7f66
commit fa9162754c
1 changed files with 1 additions and 2 deletions
@@ -7,8 +7,7 @@ class Solution {
    public int solution(int[][] data, int col, int row_begin, int row_end) {
        int answer = 0;
        List<int[]> al = Arrays.asList(data);
-        al.sort((o1,o2) -> o2[0] - o1[0]);
-        al.sort((o1,o2) -> o1[col-1] - o2[col-1]);
+        al.sort((o1,o2) -> (o1[col-1]==o2[col-1])? o2[0] - o1[0] : o1[col-1] - o2[col-1]);
        for(int c = row_begin; c <= row_end; c++) answer ^= S_i(al.get(c-1),c);
        return answer;
    }