题目：

题解：

class Solution {
    public int[] findRightInterval(int[][] intervals) {
        int n = intervals.length;
        int[][] startIntervals = new int[n][2];
        int[][] endIntervals = new int[n][2];
        for (int i = 0; i < n; i++) {
            startIntervals[i][0] = intervals[i][0];
            startIntervals[i][1] = i;
            endIntervals[i][0] = intervals[i][1];
            endIntervals[i][1] = i;
        }
        Arrays.sort(startIntervals, (o1, o2) -> o1[0] - o2[0]);
        Arrays.sort(endIntervals, (o1, o2) -> o1[0] - o2[0]);

        int[] ans = new int[n];
        for (int i = 0, j = 0; i < n; i++) {
            while (j < n && endIntervals[i][0] > startIntervals[j][0]) {
                j++;
            }
            if (j < n) {
                ans[endIntervals[i][1]] = startIntervals[j][1];
            } else {
                ans[endIntervals[i][1]] = -1;
            }
        }
        return ans;
    }
}