From a80643987d4680b179279c11665dbfb79ca73b0a Mon Sep 17 00:00:00 2001
From: EvgrafovMichail <evgrafov.md@phystech.edu>
Date: Sat, 4 Oct 2025 01:14:06 +0300
Subject: [PATCH] Add tasks for les3

---
 README.md                    | Bin 204 -> 316 bytes
 solutions/lesson03/task1.py  |   3 ++
 solutions/lesson03/task2.py  |   3 ++
 solutions/lesson03/task3.py  |   3 ++
 tests/test_lesson03_tasks.py |  60 +++++++++++++++++++++++++++++++++++
 5 files changed, 69 insertions(+)
 create mode 100644 solutions/lesson03/task1.py
 create mode 100644 solutions/lesson03/task2.py
 create mode 100644 solutions/lesson03/task3.py
 create mode 100644 tests/test_lesson03_tasks.py

diff --git a/README.md b/README.md
index fba8712d2e7707a319d9ef7c99e545f3db1ae20e..27b1924ff08f604d5fc40a5ca31f487c71b83165 100644
GIT binary patch
delta 39
ucmX@ZxQA)NnTatHyb26XEDkKDEKV#wET$71?RktD^cgf6tQmM2xEKJ<`3K?v

delta 6
NcmdnPbcS)l82|~F0_Xq$

diff --git a/solutions/lesson03/task1.py b/solutions/lesson03/task1.py
new file mode 100644
index 00000000..f1d8fe26
--- /dev/null
+++ b/solutions/lesson03/task1.py
@@ -0,0 +1,3 @@
+def flip_bits_in_range(num: int, left_bit: int, right_bit: int) -> int:
+    # ваш код
+    return num
\ No newline at end of file
diff --git a/solutions/lesson03/task2.py b/solutions/lesson03/task2.py
new file mode 100644
index 00000000..a3a738c2
--- /dev/null
+++ b/solutions/lesson03/task2.py
@@ -0,0 +1,3 @@
+def get_cube_root(n: float, eps: float) -> float:
+    # ваш код
+    return n
\ No newline at end of file
diff --git a/solutions/lesson03/task3.py b/solutions/lesson03/task3.py
new file mode 100644
index 00000000..5e91a6ac
--- /dev/null
+++ b/solutions/lesson03/task3.py
@@ -0,0 +1,3 @@
+def get_nth_digit(num: int) -> int:
+    # ваш код
+    return 0
diff --git a/tests/test_lesson03_tasks.py b/tests/test_lesson03_tasks.py
new file mode 100644
index 00000000..157c1f8c
--- /dev/null
+++ b/tests/test_lesson03_tasks.py
@@ -0,0 +1,60 @@
+import pytest
+
+from solutions.lesson03.task1 import flip_bits_in_range
+from solutions.lesson03.task2 import get_cube_root
+from solutions.lesson03.task3 import get_nth_digit
+
+
+@pytest.mark.parametrize(
+    "num, left_bit, right_bit, result_expected",
+    [
+        pytest.param(0b1011, 1, 1, 0b1010, id="invert_lsb"),
+        pytest.param(0b1011, 2, 2, 0b1001, id="invert_second_bit"),
+        pytest.param(0b1000, 1, 3, 0b1111, id="invert_bits_1_to_3"),
+        pytest.param(0b1011, 1, 4, 0b0100, id="invert_all_4_bits"),
+        pytest.param(0, 1, 5, 0b11111, id="invert_zero_range"),
+        pytest.param(0b11111, 2, 4, 0b10001, id="invert_middle_bits"),
+        pytest.param(0b1000000, 7, 7, 0b0000000, id="invert_single_high_bit"),
+        pytest.param(0b10101010, 1, 8, 0b01010101, id="invert_full_byte"),
+        pytest.param(0b11111, 1, 5, 0, id="invert_to_zero"),
+    ],
+)
+def test_flip_bits_in_range(num: int, left_bit: int, right_bit: int, result_expected: int):
+    assert flip_bits_in_range(num, left_bit, right_bit) == result_expected
+
+
+@pytest.mark.parametrize(
+    "n, eps",
+    [
+        pytest.param(27, 1e-6, id="positive_perfect_cube"),
+        pytest.param(-8, 1e-6, id="negative_perfect_cube"),
+        pytest.param(0.125, 1e-3, id="fractional_positive"),
+        pytest.param(-0.001, 1e-3, id="fractional_negative"),
+        pytest.param(0, 1e-5, id="zero"),
+        pytest.param(2, 1e-7, id="irrational_root"),
+        pytest.param(-27, 1e-1, id="negative_large_cube"),
+        pytest.param(1, 1e-4, id="one"),
+        pytest.param(-1, 1e-4, id="minus_one"),
+        pytest.param(0.000001, 1e-1, id="very_small_positive"),
+        pytest.param(1_000_000_000, 1e-5, id="large_positive_number"),
+    ],
+)
+def test_get_cube_root(n: float, eps: float):
+    result = get_cube_root(n, eps)
+    assert abs(result**3 - n) < eps
+
+
+@pytest.mark.parametrize(
+    "n, result_expected",
+    [
+        pytest.param(1, 0, id="one"),
+        pytest.param(5, 8, id="five"),
+        pytest.param(10, 1, id="ten"),
+        pytest.param(100, 0, id="hundred"),
+        pytest.param(1001, 2, id="thousand_one"),
+        pytest.param(10**8, 3, id="hundred_million"),
+        pytest.param(10**9, 6, id="billion"),
+    ],
+)
+def test_get_nth_digit(n: int, result_expected: int):
+    assert get_nth_digit(n) == result_expected