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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.     double angle_error = err * 0.001; // 转换为实际的角度误差
  14.  
  15.     Point target, hide_sites[n];
  16.     scanf("%d %d", &target.x, &target.y);
  17.  
  18.     for (int i = 0; i < n; ++i) {
  19.         scanf("%d %d", &hide_sites[i].x, &hide_sites[i].y);
  20.     }
  21.  
  22.     int min_head_error = 99999;
  23.     int head_index = -1;
  24.     int min_torso_error = 99999;
  25.     int torso_index1 = -1, torso_index2 = -1;
  26.  
  27.     for (int i = 0; i < n; ++i) {
  28.         int distance_square = (hide_sites[i].x - target.x) * (hide_sites[i].x - target.x) +
  29.                              (hide_sites[i].y - target.y) * (hide_sites[i].y - target.y);
  30.         double distance = sqrt(distance_square); // 距离
  31.         double error = distance * angle_error; // 转换为角度误差
  32.  
  33.         if (error <= min_head_error) {
  34.             min_head_error = error;
  35.             head_index = i;
  36.         }
  37.  
  38.         if (error <= min_torso_error) {
  39.             min_torso_error = error;
  40.             torso_index2 = torso_index1;
  41.             torso_index1 = i;
  42.         }
  43.     }
  44.  
  45.     int target_width = 0;
  46.     if (min_head_error <= 1000) {
  47.         target_width = 15;
  48.     } else if (min_torso_error <= 2000) {
  49.         target_width = 35;
  50.     }
  51.  
  52.     if (target_width > 0) {
  53.         printf("%d", head_index);
  54.         if (target_width == 35) {
  55.             printf(" %d", torso_index1);
  56.         }
  57.         printf("\n");
  58.     } else {
  59.         printf("abort\n");
  60.     }
  61.  
  62.     return 0;
  63. }
  64.  
Success #stdin #stdout 0.01s 5464KB
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https://ideone.com/Sv75pr
language:
C (gcc 8.3)
created:
2 years ago
visibility:
public

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