Problem p03033 (python)

Fixed submission:
#!/usr/bin/env python
"""<https://github.com/cheran-senthil/PyRival>"""
from __future__ import division, print_function

import collections
import os
import sys
from io import BytesIO, IOBase

if sys.version_info[0] < 3:
    from __builtin__ import xrange as range
    from future_builtins import ascii, filter, hex, map, oct, zip
else:
    _str = str
    str = lambda x=b"": x if type(x) is bytes else _str(x).encode()


def main():
    N, Q = map(int, input().split())
    updates = []
    for i in range(N):
        S, T, X = map(int, input().split())
        updates.append((S - X, 1, X))
        updates.append((T - X, -1, X))

    active = []
    to_delete = collections.defaultdict(int)
    import heapq
    updates.sort(reverse=True)
    for _ in range(Q):
        x = int(input())
        while updates and updates[-1][0] <= x:
            coord, tp, val = updates.pop()

            if tp == -1:
                to_delete[val] += 1
            else:
                heapq.heappush(active, val)

            while active and to_delete[active[0]] > 0:
                to_delete[active[0]] -= 1
                heapq.heappop(active)
        print(active[0] if active else -1)


# region fastio

BUFSIZE = 8192


class FastIO(IOBase):
    newlines = 0

    def __init__(self, file):
        self._buffer = BytesIO()
        self._fd = file.fileno()
        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):
        if self._buffer.tell():
            return self._buffer.read()
        return os.read(self._fd, os.fstat(self._fd).st_size)

    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)


def print(*args, **kwargs):
    """Prints the values to a stream, or to sys.stdout by default."""
    sep, file = kwargs.pop("sep", b" "), kwargs.pop("file", sys.stdout)
    at_start = True
    for x in args:
        if not at_start:
            file.write(sep)
        file.write(str(x))
        at_start = False
    file.write(kwargs.pop("end", b"\n"))
    if kwargs.pop("flush", False):
        file.flush()


sys.stdin, sys.stdout = FastIO(sys.stdin), FastIO(sys.stdout)
input = lambda: sys.stdin.readline().rstrip(b"\r\n")

# endregion

if __name__ == "__main__":
    main()

Buggy submission (verdict: Runtime Error):
import math


class Node:

    def __init__(self, start, end):
        self.start, self.end, self.mid = start, end, (start + end) // 2
        self.val = math.inf
        self.left = self.right = None


class NumArray:

    def __init__(self, x):
        x.sort()
        self.x_i = {v: i for i, v in enumerate(x)}
        def createTree(l, r):
            if l >= r:
                return None
            root = Node(l, r)
            if l + 1 == r:
                return root
            mid = root.mid
            root.left = createTree(l, mid)
            root.right = createTree(mid, r)
            return root
        self.root = createTree(0, len(x) - 1)

    def update(self, x1, x2, val):
        def updateVal(root, i, j):
            if root.start == i and root.end == j:
                root.val = min(root.val, val)
            else:
                mid = root.mid
                if i < mid:
                    updateVal(root.left, i, min(mid, j))
                if mid < j:
                    updateVal(root.right, max(mid, i), j)
        return updateVal(self.root, self.x_i[x1], self.x_i[x2])

    def query(self, x):
        def queryVal(root, i):
            if not root or i < root.start or i >= root.end:
                return math.inf
            else:
                return min(root.val, queryVal(root.left, i), queryVal(root.right, i))
        return queryVal(self.root, self.x_i[x])

def main():
    from sys import stdin, stdout

    def read():
        return stdin.readline().rstrip('\n')

    def read_array(sep=None, maxsplit=-1):
        return read().split(sep, maxsplit)

    def read_int():
        return int(read())

    def read_int_array(sep=None, maxsplit=-1):
        return [int(a) for a in read_array(sep, maxsplit)]

    def write(*args, **kwargs):
        sep = kwargs.get('sep', ' ')
        end = kwargs.get('end', '\n')
        stdout.write(sep.join(str(a) for a in args) + end)

    def write_array(array, **kwargs):
        sep = kwargs.get('sep', ' ')
        end = kwargs.get('end', '\n')
        stdout.write(sep.join(str(a) for a in array) + end)

    N, Q = read_int_array()
    coords = {10**10, -10**10}
    updates = []
    for i in range(N):
        S, T, X = read_int_array()
        start, end = S-X, T-X
        coords.add(start)
        coords.add(end)
        coords.add(end)
        updates.append((start, end, X))

    ppl = []
    for i in range(Q):
        x = read_int()
        ppl.append(x)
        coords.add(x)

    st = NumArray(list(coords))
    for s, e, x in updates:
        st.update(s, e, x)
    for x in ppl:
        ans = st.query(x)
        write(ans if ans < math.inf else -1)

main()