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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. // 定義一個結構體，表示二維坐標點
  5. typedef struct {
  6.     int x, y;
  7. } Point;
  8.  
  9. int main() {
  10.     // 讀取輸入的誤差值和總共的藏身點數量
  11.     int err, n;
  12.     scanf("%d", &err);
  13.     scanf("%d", &n);
  14.  
  15.     // 讀取目標點的坐標
  16.     Point target, hide_sites[n];
  17.     scanf("%d %d", &target.x, &target.y);
  18.  
  19.     // 讀取所有藏身點的坐標
  20.     for (int i = 0; i < n; ++i) {
  21.         scanf("%d %d", &hide_sites[i].x, &hide_sites[i].y);
  22.     }
  23.  
  24.     // 初始化最小頭部誤差和頭部索引，最小軀幹誤差和軀幹索引
  25.     int min_head_error = 99999;
  26.     int head_index = -1;
  27.     int min_torso_error = 99999;
  28.     int torso_index1 = -1, torso_index2 = -1;
  29.  
  30.     // 遍歷所有藏身點，計算與目標的距離，更新最小誤差和對應的索引
  31.     for (int i = 0; i < n; ++i) {
  32.         int distance_square = (hide_sites[i].x - target.x) * (hide_sites[i].x - target.x) +
  33.                              (hide_sites[i].y - target.y) * (hide_sites[i].y - target.y);
  34.         int error = sqrt(distance_square);
  35.  
  36.         // 更新最小頭部誤差和頭部索引
  37.         if (error <= min_head_error) {
  38.             min_head_error = error;
  39.             head_index = i;
  40.         }
  41.  
  42.         // 更新最小軀幹誤差和軀幹索引
  43.         if (error <= min_torso_error) {
  44.             min_torso_error = error;
  45.             torso_index2 = torso_index1;
  46.             torso_index1 = i;
  47.         }
  48.     }
  49.  
  50.     int error = 0;
  51.     int target_width = 0;
  52.  
  53.     // 根據最小誤差計算目標的寬度
  54.     if (min_head_error <= 1000) {
  55.         target_width = 15;
  56.     } else if (min_torso_error <= 2000) {
  57.         target_width = 35;
  58.     }
  59.  
  60.     // 計算誤差值
  61.     if (target_width > 0) {
  62.         error = (target_width * 100) / min_head_error;
  63.     }
  64.  
  65.     // 根據目標的寬度和誤差值輸出結果
  66.     if (target_width == 15) {
  67.         // 如果目標是頭部，輸出頭部的藏身點索引
  68.         printf("%d\n", head_index);
  69.     } else if (target_width == 35) {
  70.         // 如果目標是軀幹，輸出兩個軀幹的藏身點索引
  71.         printf("%d %d\n", torso_index1, torso_index2);
  72.     } else {
  73.         // 如果無法擊中目標，輸出 "abort"
  74.         printf("abort\n");
  75.     }
  76.  
  77.     return 0;
  78. }
  79.  
Success #stdin #stdout 0.01s 5516KB
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https://ideone.com/DnPRCi
language:
C (gcc 8.3)
created:
2 years ago
visibility:
public

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