diff --git a/2021/d01/p1.py b/2021/d01/p1.py
new file mode 100644
index 0000000..baf308d
--- /dev/null
+++ b/2021/d01/p1.py
@@ -0,0 +1,34 @@
+import itertools
+from pathlib import Path
+from typing import Sequence, Iterable
+
+
+INPUT_FILE_PATH = Path('..', 'inputs', '1.txt')
+
+
+def get_measurements_from_input(input_text: str) -> Iterable[int]:
+    """
+    :param input_text: input test to process
+    :return: split measurements from the input
+    """
+    return map(int, input_text.splitlines())
+
+
+def get_depth_measurements_increases(measurements: Sequence[int]) -> int:
+    """
+    :param measurements: measurements to parse
+    :return: count of the number of times a depth measurement increases
+    """
+    return sum(couple[1] > couple[0] for couple in itertools.pairwise(measurements))
+
+
+def main():
+    input_text = INPUT_FILE_PATH.read_text()
+    measurements = get_measurements_from_input(input_text)
+
+    depth_measurements_increases = get_depth_measurements_increases(measurements)
+    print(f'Amount of measurements which are larger than the previous measurement: {depth_measurements_increases}')
+
+
+if __name__ == '__main__':
+    main()
diff --git a/2021/d01/p2.py b/2021/d01/p2.py
new file mode 100644
index 0000000..6729b44
--- /dev/null
+++ b/2021/d01/p2.py
@@ -0,0 +1,34 @@
+from typing import Iterable
+
+from p1 import INPUT_FILE_PATH, get_measurements_from_input, get_depth_measurements_increases
+
+
+_DEFAULT_WINDOW_SIZE = 3
+
+
+def get_measurements_windows(measurements: Iterable[int], window_size: int = _DEFAULT_WINDOW_SIZE) -> Iterable[
+                                                                                                      tuple[int]]:
+    """
+    Create sliding windows of measurements and return them.
+    Stop when there are not enough measurements to produce a window with the given size.
+    :param measurements: measurements to create windows from
+    :param window_size: size of every window
+    :return: measurements windows
+    """
+    measurements = list(measurements)
+    indented_measurements = (measurements[i:] for i in range(window_size))
+    return zip(*indented_measurements)
+
+
+def main():
+    input_text = INPUT_FILE_PATH.read_text()
+    measurements = get_measurements_from_input(input_text)
+    windows = get_measurements_windows(measurements)
+    windows_sums = [sum(window) for window in windows]
+
+    sums_increases = get_depth_measurements_increases(windows_sums)
+    print(f'Amount of measurements windows sums which are larger than the previous sum: {sums_increases}')
+
+
+if __name__ == '__main__':
+    main()