Data Structures

Trailing Volume Tracker

Difficulty

Asked at The Voleon Group

Theory: Data Structures You Implement, Not Import

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Available in Python and C++. You are solving it in Python. Switch to C++

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Language:

Python 3.12 C++23

run_ops

from typing import Any


class TrailingVolume:
    def __init__(self, window: int) -> None:
        """..."""
        # ...
        pass

    def add(self, ts: int, qty: int) -> None:
        """..."""
        # ...
        pass

    def volume(self, ts: int) -> int:
        """..."""
        # ...
        pass


# ...
def run_ops(window: int, ops: list[tuple[Any, ...]]) -> list[int]:
    tracker = TrailingVolume(window)
    out = []
    for op in ops:
        if op[0] == "add":
            tracker.add(op[1], op[2])
        else:
            out.append(tracker.volume(op[1]))
    return out

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