solved(python): baekjoon 1014

Author: himitery

baekjoon/python/1014/__init__.py

@@ -0,0 +1,39 @@
+import itertools
+import sys
+from collections import defaultdict
+
+read = lambda: sys.stdin.readline().rstrip()
+
+
+class Problem:
+    def __init__(self):
+        self.n, self.m = map(int, read().split())
+        self.grid = [list(map(lambda x: int(x == "."), list(read()))) for _ in range(self.n)]
+
+    def solve(self) -> None:
+        dp = [defaultdict(int) for _ in range(self.n)]
+        for state in self.find_states(0):
+            dp[0][state] = self.count_one(state)
+
+        for row in range(1, self.n):
+            for current, previous in itertools.product(self.find_states(row), dp[row - 1]):
+                if (current & (previous << 1)) == (current & (previous >> 1)) == 0:
+                    dp[row][current] = max(dp[row][current], dp[row - 1][previous] + self.count_one(current))
+
+        print(max([x for x in dp[-1].values()]))
+
+    def find_states(self, row: int) -> list[int]:
+        blocked = 0
+        for col in range(self.m):
+            if self.grid[row][col] == 0:
+                blocked |= 1 << col
+
+        return [state for state in range(1 << self.m) if (state & blocked) == 0 and (state & (state >> 1)) == 0]
+
+    def count_one(self, num: int):
+        return bin(num).count("1")
+
+
+if __name__ == "__main__":
+    for _ in range(int(read())):
+        Problem().solve()

baekjoon/python/1014/main.py

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+[
+  {
+    "input": [
+      "4",
+      "2 3",
+      "...",
+      "...",
+      "2 3",
+      "x.x",
+      "xxx",
+      "2 3",
+      "x.x",
+      "x.x",
+      "10 10",
+      "....x.....",
+      "..........",
+      "..........",
+      "..x.......",
+      "..........",
+      "x...x.x...",
+      ".........x",
+      "...x......",
+      "........x.",
+      ".x...x...."
+    ],
+    "expected": [
+      "4",
+      "1",
+      "2",
+      "46"
+    ]
+  }
+]

baekjoon/python/1014/sample.json

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+import json
+import os.path
+import sys
+import unittest
+from io import StringIO
+from unittest.mock import patch
+
+from parameterized import parameterized
+
+from main import Problem
+
+
+def load_sample(filename: str):
+    path = os.path.join(os.path.dirname(os.path.abspath(__file__)), filename)
+
+    with open(path, "r") as file:
+        return [(case["input"], case["expected"]) for case in json.load(file)]
+
+
+class TestCase(unittest.TestCase):
+    @parameterized.expand(load_sample("sample.json"))
+    def test_case(self, case: str, expected: list[str]):
+        # When
+        with (
+            patch("sys.stdin.readline", side_effect=case),
+            patch("sys.stdout", new_callable=StringIO) as output,
+        ):
+            for _ in range(int(sys.stdin.readline().rstrip())):
+                Problem().solve()
+
+            result = output.getvalue().rstrip()
+
+        # Then
+        self.assertEqual("\n".join(expected), result)
+
+
+if __name__ == "__main__":
+    unittest.main()