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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 = 999999999;
  21.     int head_index = -1;
  22.     int min_torso_error = 999999999;
  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.  
  29.         int target_width = 0;
  30.         if (distance_square <= 1000 * 1000) {  // 1000厘米转换为1米的平方
  31.             target_width = 15;
  32.         } else if (distance_square <= 2000 * 2000) {  // 2000厘米转换为2米的平方
  33.             target_width = 35;
  34.         }
  35.  
  36.         int error_rate = 0;
  37.         if (target_width == 15) {
  38.             error_rate = (target_width * 100 * 100) / distance_square;  // 转换为厘米的平方
  39.         } else if (target_width == 35) {
  40.             error_rate = (target_width * 100 * 100) / distance_square;  // 转换为厘米的平方
  41.         }
  42.  
  43.         if (error_rate > err) {
  44.             printf("abort\n");
  45.             return 0;
  46.         }
  47.  
  48.         if (target_width == 15 && error_rate <= err && distance_square < min_head_error) {
  49.             min_head_error = distance_square;
  50.             head_index = i;
  51.         } else if (target_width == 35 && error_rate <= err && distance_square < min_torso_error) {
  52.             min_torso_error = distance_square;
  53.             torso_index2 = torso_index1;
  54.             torso_index1 = i;
  55.         }
  56.     }
  57.  
  58.     if (head_index != -1) {
  59.         printf("%d\n", head_index);
  60.     } else if (torso_index1 != -1) {
  61.         printf("%d %d\n", torso_index1, torso_index2);
  62.     } else {
  63.         printf("abort\n");
  64.     }
  65.  
  66.     return 0;
  67. }
  68.  
Success #stdin #stdout 0s 5424KB
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https://ideone.com/GM29Sv
language:
C (gcc 8.3)
created:
2 years ago
visibility:
public

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