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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. typedef struct {
  5.     int x, y;
  6. } Point;
  7.  
  8. int main() {
  9.     int err, n;
  10.     scanf("%d", &err);
  11.     scanf("%d", &n);
  12.  
  13.     Point target, hide_sites[n];
  14.     scanf("%d %d", &target.x, &target.y);
  15.  
  16.     for (int i = 0; i < n; ++i) {
  17.         scanf("%d %d", &hide_sites[i].x, &hide_sites[i].y);
  18.     }
  19.  
  20.     int min_head_error = 99999;
  21.     int head_index = -1;
  22.     int min_torso_error = 99999;
  23.     int torso_index1 = -1, torso_index2 = -1;
  24.  
  25.     for (int i = 0; i < n; ++i) {
  26.         int distance_square = (hide_sites[i].x - target.x) * (hide_sites[i].x - target.x) +
  27.                              (hide_sites[i].y - target.y) * (hide_sites[i].y - target.y);
  28.         int error_val = sqrt(distance_square);
  29.  
  30.         if (error_val <= min_head_error) {
  31.             min_head_error = error_val;
  32.             head_index = i;
  33.         }
  34.  
  35.         if (error_val <= min_torso_error) {
  36.             min_torso_error = error_val;
  37.             torso_index2 = torso_index1;
  38.             torso_index1 = i;
  39.         }
  40.     }
  41.  
  42.     int error_rate = 0;
  43.     int target_width = 0;
  44.  
  45.     // 計算目標寬度所需的mil數
  46.     if (min_head_error <= 1000) {
  47.         target_width = 15;
  48.     } else if (min_torso_error <= 2000 && n >= 3) {
  49.         // 加入條件：隱藏點至少有3個以上才能命中軀幹
  50.         target_width = 35;
  51.     }
  52.  
  53.     // 計算錯誤率
  54.     if (target_width > 0) {
  55.         error_rate = (target_width * 100) / min_head_error;
  56.     }
  57.  
  58.     if (error_rate >= err) {
  59.         printf("abort\n");
  60.     } else if (target_width == 15) {
  61.         printf("%d\n", head_index);
  62.     } else if (target_width == 35) {
  63.         printf("%d %d\n", torso_index1, torso_index2);
  64.     }
  65.  
  66.     return 0;
  67. }
  68.  
Success #stdin #stdout 0s 5428KB
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https://ideone.com/re9q16
language:
C (gcc 8.3)
created:
2 years ago
visibility:
public

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