update

luogu_py/p3717.py

@@ -1,27 +1,39 @@
-# Unfinish
 from typing import Tuple, List
 import math
 
-n, m, r = input().split(" ")
-locations: List[Tuple[str, str]] = []
-for i in range(int(m)):
-    location: Tuple[str, str] = tuple(input().split(" "))
-    locations.append(location)
+n, m, r = map(int, input().split())
+locations: List[Tuple[int, int]] = []
 
-map = [[0 for _ in range(int(n))] for _ in range(int(n))]
+for i in range(m):
+    x, y = map(int, input().split())
+    # 将输入的1-based坐标转换为0-based坐标
+    locations.append((x - 1, y - 1))
+
+grid = [[0 for _ in range(n)] for _ in range(n)]
 count = 0
 
-for i in range(int(n)):
-    for j in range(int(n)):
-        if map[i][j] == 0:
-            for k in range(int(m)):
-                distance = math.sqrt(
-                    (int(locations[k][0]) - i) ** 2 + (int(locations[k][1]) - j) ** 2
-                )
-                if distance <= float(r):
-                    map[i][j] = 1
-                    count = count + 1
-                    break
+for location in locations:
+    x, y = location
+    if grid[x][y] != 1:
+        grid[x][y] = 1
+        count += 1
+
+    # 检查半径r内的所有点
+    left = max(0, x - r)
+    right = min(n, x + r + 1)
+    top = max(0, y - r)
+    bottom = min(n, y + r + 1)
+
+    for i in range(left, right):
+        for j in range(top, bottom):
+            # 计算点(i,j)到探测器(x,y)的距离
+            distance = math.sqrt((i - x) ** 2 + (j - y) ** 2)
+            if distance <= r:  # 如果在探测范围内
+                if grid[i][j] != 1:
+                    grid[i][j] = 1
+                    count += 1
 
 print(count)
-print(map)
+for row in grid:
+    print(row)
+