holy fuking shit

src/mcm26b/belief/__init__.py

@@ -126,10 +126,10 @@ class CandidateRegion:
     @classmethod
     def initial(cls, station: Vec2, config: ProblemConfig) -> "CandidateRegion":
         """首个 direction 后的基础集：Ω ∩ B(station, r_max) 的保守外包。"""
-        field, sides = config.field, config.search.polygon_sides
-        slack = field.omega_radius_m * (1 - math.cos(math.pi / sides))
-        region = cls.disk((0.0, 0.0), field.omega_radius_m, sides, slack)
-        region.clip_disk(station, field.r_eff_max_m, sides)
+        field_cfg, sides = config.field, config.search.polygon_sides
+        slack = field_cfg.omega_radius_m * (1 - math.cos(math.pi / sides))
+        region = cls.disk((0.0, 0.0), field_cfg.omega_radius_m, sides, slack)
+        region.clip_disk(station, field_cfg.r_eff_max_m, sides)
         return region
 
     # ------------------------------------------------------------ 收缩
@@ -198,8 +198,7 @@ class CandidateRegion:
         if len(self.polygon) == 2:
             p, q = self.polygon
             return _point_segment_distance(point, p, q) <= tol_m + self.slack_m
-        for index in range(len(self.polygon)):
-            p = self.polygon[index]
+        for index, p in enumerate(self.polygon):
             q = self.polygon[(index + 1) % len(self.polygon)]
             if (q[0] - p[0]) * (point[1] - p[1]) - (q[1] - p[1]) * (point[0] - p[0]) \
                     < -tol_m - self.slack_m: