solved(python): baekjoon 1005

Author: himitery

baekjoon/python/1005/__init__.py

@@ -0,0 +1,40 @@
+import sys
+from collections import defaultdict, deque
+
+read = lambda: sys.stdin.readline().rstrip()
+
+
+class Problem:
+    def __init__(self):
+        self.n, self.k = map(int, read().split())
+        self.times = list(map(int, read().split()))
+
+        self.order, self.depth = defaultdict(list[int]), [0 for _ in range(self.n)]
+        for _ in range(self.k):
+            src, dest = map(int, read().split())
+            self.order[src - 1].append(dest - 1)
+            self.depth[dest - 1] += 1
+
+        self.target = int(read()) - 1
+
+    def solve(self) -> None:
+        dp, queue = self.times[:], deque(
+            list(filter(lambda num: self.depth[num] == 0, range(self.n)))
+        )
+
+        while queue:
+            node = queue.popleft()
+
+            for next_node in self.order[node]:
+                dp[next_node] = max(dp[next_node], dp[node] + self.times[next_node])
+                self.depth[next_node] -= 1
+
+                if self.depth[next_node] == 0:
+                    queue.append(next_node)
+
+        print(dp[self.target])
+
+
+if __name__ == "__main__":
+    for _ in range(int(read())):
+        Problem().solve()

baekjoon/python/1005/main.py

@@ -0,0 +1,82 @@
+[
+  {
+    "input": [
+      "2",
+      "4 4",
+      "10 1 100 10",
+      "1 2",
+      "1 3",
+      "2 4",
+      "3 4",
+      "4",
+      "8 8",
+      "10 20 1 5 8 7 1 43",
+      "1 2",
+      "1 3",
+      "2 4",
+      "2 5",
+      "3 6",
+      "5 7",
+      "6 7",
+      "7 8",
+      "7"
+    ],
+    "expected": [
+      "120",
+      "39"
+    ]
+  },
+  {
+    "input": [
+      "5",
+      "3 2",
+      "1 2 3",
+      "3 2",
+      "2 1",
+      "1",
+      "4 3",
+      "5 5 5 5",
+      "1 2",
+      "1 3",
+      "2 3",
+      "4",
+      "5 10",
+      "100000 99999 99997 99994 99990",
+      "4 5",
+      "3 5",
+      "3 4",
+      "2 5",
+      "2 4",
+      "2 3",
+      "1 5",
+      "1 4",
+      "1 3",
+      "1 2",
+      "4",
+      "4 3",
+      "1 1 1 1",
+      "1 2",
+      "3 2",
+      "1 4",
+      "4",
+      "7 8",
+      "0 0 0 0 0 0 0",
+      "1 2",
+      "1 3",
+      "2 4",
+      "3 4",
+      "4 5",
+      "4 6",
+      "5 7",
+      "6 7",
+      "7"
+    ],
+    "expected": [
+      "6",
+      "5",
+      "399990",
+      "2",
+      "0"
+    ]
+  }
+]

baekjoon/python/1005/sample.json

@@ -0,0 +1,38 @@
+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()