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74 lines (60 loc) · 2.24 KB
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#!/usr/bin/env python3
import unittest
from src.struct.segment_tree.template import SegmentTree, LazySegmentTree
class TestSegmentTree(unittest.TestCase):
def test_build_and_query(self):
seg = SegmentTree(max, -10**9, [1, 3, 2, 5, 4])
self.assertEqual(seg.prod(0, 3), 3)
self.assertEqual(seg.prod(1, 4), 5)
self.assertEqual(seg.all_prod(), 5)
self.assertEqual(seg.get(2), 2)
def test_point_update(self):
seg = SegmentTree(min, 10**9, [1, 3, 2, 5, 4])
seg.set(1, 0)
self.assertEqual(seg.prod(0, 3), 0)
self.assertEqual(seg.prod(1, 4), 0)
def test_range_sum(self):
seg = SegmentTree(lambda a, b: a + b, 0, [1, 2, 3, 4, 5])
self.assertEqual(seg.prod(0, 3), 6)
self.assertEqual(seg.prod(2, 5), 12)
seg.set(2, 10)
self.assertEqual(seg.prod(0, 5), 22)
def test_size_constructor(self):
seg = SegmentTree(lambda a, b: a + b, 0, 5)
self.assertEqual(seg.all_prod(), 0)
seg.set(3, 7)
self.assertEqual(seg.get(3), 7)
self.assertEqual(seg.prod(2, 5), 7)
class TestLazySegmentTree(unittest.TestCase):
@staticmethod
def _make_range_add_min_tree(arr):
return LazySegmentTree(
op=min,
e=10**9,
mapping=lambda f, x: f + x,
composition=lambda f, g: f + g,
idlazy=0,
v=arr,
)
def test_range_add_min(self):
seg = self._make_range_add_min_tree([3, 1, 4, 1, 5])
seg.apply(0, 3, 10)
self.assertEqual(seg.get(0), 13)
self.assertEqual(seg.get(2), 14)
self.assertEqual(seg.get(4), 5)
self.assertEqual(seg.prod(0, 5), 1)
def test_range_add_min_overlap(self):
seg = self._make_range_add_min_tree([5, 5, 5, 5, 5])
seg.apply(0, 3, -2)
seg.apply(2, 5, -1)
self.assertEqual(seg.get(0), 3)
self.assertEqual(seg.get(2), 2)
self.assertEqual(seg.get(4), 4)
self.assertEqual(seg.prod(0, 5), 2)
def test_point_apply(self):
seg = self._make_range_add_min_tree([10, 20, 30])
seg.apply(1, f=5)
self.assertEqual(seg.get(1), 25)
self.assertEqual(seg.get(0), 10)
if __name__ == "__main__":
unittest.main()