class Solution {
    public int[] solution(int[] arr, int[][] queries) {
        int[] answer = {};
        return answer;
    }
}

해결법

방법 1

class Solution {
    public int[] solution(int[] arr, int[][] queries) {

        for (int[] query : queries) {
            int i = query[0];
            int j = query[1];
            
            int temp = arr[i];
            arr[i] = arr[j];
            arr[j] = temp;
        }

        return arr;
    }
}

• 참고: 두 값을 바꾸는 방법

방법 2

class Solution {
    public int[] solution(int[] arr, int[][] queries) {

        for (int i = 0; i < queries.length; i ++) {
            int one = arr[queries[i][0]];
            int two = arr[queries[i][1]];

            arr[queries[i][0]] = two;
            arr[queries[i][1]] = one;
        }

        return arr;
    }
}

수열과 구간 쿼리 3 Lv. 0