solved(python): baekjoon 16928

Author: himitery

baekjoon/python/16928/__init__.py

@@ -0,0 +1,42 @@
+import sys
+from collections import deque, defaultdict
+
+read = lambda: sys.stdin.readline().rstrip()
+
+
+class Problem:
+    def __init__(self):
+        self.n, self.m = map(int, read().split())
+
+        self.moves = defaultdict(int)
+        for start, end in [map(int, read().split()) for _ in range(self.n + self.m)]:
+            self.moves[start] = end
+
+    def solve(self) -> None:
+        print(self.bfs())
+
+    def bfs(self) -> int:
+        queue, board = deque([1]), [0] * 101
+
+        while queue:
+            pos = queue.popleft()
+            if pos == 100:
+                return board[pos]
+
+            for dice in range(1, 7):
+                next_pos = pos + dice
+                if next_pos > 100:
+                    continue
+
+                if next_pos in self.moves:
+                    next_pos = self.moves[next_pos]
+
+                if board[next_pos] == 0:
+                    board[next_pos] = board[pos] + 1
+                    queue.append(next_pos)
+
+        return -1
+
+
+if __name__ == "__main__":
+    Problem().solve()

baekjoon/python/16928/main.py

@@ -0,0 +1,41 @@
+[
+  {
+    "input": [
+      "3 7",
+      "32 62",
+      "42 68",
+      "12 98",
+      "95 13",
+      "97 25",
+      "93 37",
+      "79 27",
+      "75 19",
+      "49 47",
+      "67 17"
+    ],
+    "expected": [
+      "3"
+    ]
+  },
+  {
+    "input": [
+      "4 9",
+      "8 52",
+      "6 80",
+      "26 42",
+      "2 72",
+      "51 19",
+      "39 11",
+      "37 29",
+      "81 3",
+      "59 5",
+      "79 23",
+      "53 7",
+      "43 33",
+      "77 21"
+    ],
+    "expected": [
+      "5"
+    ]
+  }
+]

baekjoon/python/16928/sample.json

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+import json
+import os.path
+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,
+        ):
+            Problem().solve()
+
+            result = output.getvalue().rstrip()
+
+        # Then
+        self.assertEqual("\n".join(expected), result)
+
+
+if __name__ == "__main__":
+    unittest.main()