Method __init__

data_structures/binary_tree/segment_tree.py:5–12

(self, a)

class SegmentTree:
    def __init__(self, a):
        self.A = a
        self.N = len(self.A)
        self.st = [0] * (
            4 * self.N
        )  # approximate the overall size of segment tree with array N
        if self.N:
            self.build(1, 0, self.N - 1)

    def left(self, idx):
        """