Problem: Pavel is going to make a game of his dream. However, he knows that he can't make it on his own so he founded a development company and hired n workers of staff. Now he wants to pick n workers from the staff who will be directly responsible for developing a game.

Each worker has a certain skill level vi. Besides, each worker doesn't want to work with the one whose skill is very different. In other words, the i-th worker won't work with those whose skill is less than li, and with those whose skill is more than ri.

Pavel understands that the game of his dream isn't too hard to develop, so the worker with any skill will be equally useful. That's why he wants to pick a team of the maximum possible size. Help him pick such team.

Input

The first line contains a single integer n (1 ≤ n ≤ 105) — the number of workers Pavel hired.

Each of the following n lines contains three space-separated integers li, vi, ri (1 ≤ li ≤ vi ≤ ri ≤ 3·105) — the minimum skill value of the workers that the i-th worker can work with, the i-th worker's skill and the maximum skill value of the workers that the i-th worker can work with.

Output

In the first line print a single integer m — the number of workers Pavel must pick for developing the game.

In the next line print m space-separated integers — the numbers of the workers in any order.

If there are multiple optimal solutions, print any of them.

Examples

Input

4
2 8 9
1 4 7
3 6 8
5 8 10


Output

3
1 3 4


Input

6
3 5 16
1 6 11
4 8 12
7 9 16
2 10 14
8 13 15


Output

4
1 2 3 5

Solution (in PYTHON3):

Solution:
import os
import sys
from io import BytesIO, IOBase

BUFSIZE = 8192


class FastIO(IOBase):
    newlines = 0

    def __init__(self, file):
        self._fd = file.fileno()
        self.buffer = BytesIO()
        self.writable = 'x' in file.mode or 'r' not in file.mode
        self.write = self.buffer.write if self.writable else None

    def read(self):
        while True:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            if not b:
                break
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines = 0
        return self.buffer.read()

    def readline(self):
        while self.newlines == 0:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            self.newlines = b.count(b'\n') + (not b)
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines -= 1
        return self.buffer.readline()

    def flush(self):
        if self.writable:
            os.write(self._fd, self.buffer.getvalue())
            self.buffer.truncate(0), self.buffer.seek(0)


class IOWrapper(IOBase):
    def __init__(self, file):
        self.buffer = FastIO(file)
        self.flush = self.buffer.flush
        self.writable = self.buffer.writable
        self.write = lambda s: self.buffer.write(s.encode('ascii'))
        self.read = lambda: self.buffer.read().decode('ascii')
        self.readline = lambda: self.buffer.readline().decode('ascii')


def inp():
    return sys.stdin.readline().rstrip()


def mpint():
    return map(int, inp().split(' '))


def itg():
    return int(inp())


# ############################## import
# 2020/11/17
class LazySegmentTree:
    def __init__(self, data, default=0, func=max):
        """initialize the lazy segment tree with data"""
        self._default = default
        self._func = func

        self._len = len(data)
        self._size = _size = 1 << (self._len - 1).bit_length()
        self._lazy = [0] * (2 * _size)

        self.data = [default] * (2 * _size)
        self.data[_size:_size + self._len] = data
        for i in reversed(range(_size)):
            self.data[i] = func(self.data[i + i], self.data[i + i + 1])

    def __len__(self):
        return self._len

    def _push(self, idx):
        """push query on idx to its children"""
        # Let the children know of the queries
        q, self._lazy[idx] = self._lazy[idx], 0

        self._lazy[2 * idx] += q
        self._lazy[2 * idx + 1] += q
        self.data[2 * idx] += q
        self.data[2 * idx + 1] += q

    def _update(self, idx):
        """updates the node idx to know of all queries applied to it via its ancestors"""
        for i in reversed(range(1, idx.bit_length())):
            self._push(idx >> i)

    def _build(self, idx):
        """make the changes to idx be known to its ancestors"""
        idx >>= 1
        while idx:
            self.data[idx] = self._func(self.data[2 * idx], self.data[2 * idx + 1]) + self._lazy[idx]
            idx >>= 1

    def add(self, start, stop, value):
        """lazily add value to [start, stop)"""
        start = start_copy = start + self._size
        stop = stop_copy = stop + self._size
        while start < stop:
            if start & 1:
                self._lazy[start] += value
                self.data[start] += value
                start += 1
            if stop & 1:
                stop -= 1
                self._lazy[stop] += value
                self.data[stop] += value
            start >>= 1
            stop >>= 1

        # Tell all nodes above of the updated area of the updates
        self._build(start_copy)
        self._build(stop_copy - 1)

    def query(self, start, stop, default=None):
        """func of data[start, stop)"""
        start += self._size
        stop += self._size

        # Apply all the lazily stored queries
        self._update(start)
        self._update(stop - 1)

        res = self._default if default is None else default
        while start < stop:
            if start & 1:
                res = self._func(res, self.data[start])
                start += 1
            if stop & 1:
                stop -= 1
                res = self._func(res, self.data[stop])
            start >>= 1
            stop >>= 1
        return res

    def __repr__(self):
        return "LazySegmentTree({})".format(list(map(lambda i: self.query(i, i + 1), range(self._len))))


class SweepLine:
    def __init__(self, data=None, inclusive=True):
        """
        :param data: [((1, 2), (3, 4)), (left_bottom, right_top), ...]
        :param inclusive: include the right bound
        """
        if data:
            # [((1, 2), (3, 4), 0), ...]
            self.data = [(pair[0], pair[1], i) for i, pair in enumerate(data)]
        else:
            self.data = []
        self.discrete_dict = self.restore = None
        self.INCLUSIVE = inclusive

    def add_rectangle(self, rectangle):
        self.data.append((rectangle[0], rectangle[1], len(self.data)))

    def _discrete(self):
        st = set()
        operations = []
        for p1, p2, i in self.data:
            st |= {p1[0], p1[1], p2[0], p2[1]}
            # we want add operation go first, so *= -1
            # we calculate the line intersect
            operations.append((p1[1], -1, p1[0], p2[0], i))  # add
            operations.append((p2[1], 1, p1[0], p2[0], i))  # subtract
        self.restore = sorted(st)
        self.discrete_dict = dict(zip(self.restore, range(len(st))))
        self.operations = sorted(operations)
        # print(*self.operations, sep='\n')

    def max_intersect(self, get_points=False):
        """
        :return intersect, i (ith rectangle)
        :return intersect, i, x
        """
        if not self.restore:
            self._discrete()
        d = self.discrete_dict
        tree = LazySegmentTree([0] * len(self.restore))
        result = 0, None
        for y, v, left, right, i in self.operations:
            # print(f"left={left}, right={right}")
            left, right, v = d[left], d[right], -v
            # print(f"dis -> left={left}, right={right}")
            tree.add(left, right + self.INCLUSIVE, v)
            if v == 1:
                intersect = tree.query(left, right + self.INCLUSIVE)
                if intersect > result[0]:
                    result = intersect, i
        tree = LazySegmentTree([0] * len(self.restore))
        if get_points:
            for y, v, left, right, i in self.operations:
                left, right, v = d[left], d[right], -v
                tree.add(left, right + self.INCLUSIVE, v)
                if i == result[1]:
                    for lf in range(left, right + self.INCLUSIVE):
                        if tree.query(lf, lf + 1) == result[0]:
                            return result[0], i, self.restore[lf]
        return result

# ############################## main
def main():
    n = itg()
    data = []
    for _ in range(n):
        lf, md, rg = mpint()
        data.append(((lf, md), (md, rg)))
    sweep = SweepLine(data)
    ans1, idx, left = sweep.max_intersect(True)
    right = data[idx][0][1]
    print(ans1)
    # print(idx)
    # print(f"intersect = {ans1}")
    # print(f"left = {left}, right = {right}")
    ans2 = []
    for i, pair in enumerate(data):
        lf, md, rg = pair[0][0], pair[0][1], pair[1][1]
        if lf <= left <= md <= right <= rg:
            ans2.append(i + 1)
    if len(ans2) != ans1:
        print(AssertionError, len(ans2))
    else:
        print(*ans2)


DEBUG = 0
URL = 'https://codeforces.com/contest/377/problem/D'

if __name__ == '__main__':
    # 0: normal, 1: runner, 2: interactive, 3: debug
    if DEBUG == 1:
        import requests
        from ACgenerator.Y_Test_Case_Runner import TestCaseRunner

        runner = TestCaseRunner(main, URL)
        inp = runner.input_stream
        print = runner.output_stream
        runner.checking()
    else:
        if DEBUG != 3:
            sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
        if DEBUG:
            _print = print


            def print(*args, **kwargs):
                _print(*args, **kwargs)
                sys.stdout.flush()
        main()
# Please check!