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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, sites[n];
  14.     scanf("%d %d", &target.x, &target.y);
  15.  
  16.     int minHeadErr = 2000, minTorsoErr1 = 2000, minTorsoErr2 = 2000;
  17.     int headIndex = -1, torsoIndex1 = -1, torsoIndex2 = -1;
  18.  
  19.     for (int i = 0; i < n; ++i) {
  20.         scanf("%d %d", &sites[i].x, &sites[i].y);
  21.         int distanceSquared = (sites[i].x - target.x) * (sites[i].x - target.x) + (sites[i].y - target.y) * (sites[i].y - target.y);
  22.         int errInCentimeters = sqrt(distanceSquared);
  23.         int errInMils = errInCentimeters * 100 / 100000; // Convert to hundredths of a mil
  24.  
  25.         if (errInMils <= err) {
  26.             if (errInMils < minHeadErr) {
  27.                 minHeadErr = errInMils;
  28.                 headIndex = i;
  29.             } else if (errInMils < minTorsoErr1) {
  30.                 minTorsoErr2 = minTorsoErr1;
  31.                 torsoIndex2 = torsoIndex1;
  32.                 minTorsoErr1 = errInMils;
  33.                 torsoIndex1 = i;
  34.             } else if (errInMils < minTorsoErr2) {
  35.                 minTorsoErr2 = errInMils;
  36.                 torsoIndex2 = i;
  37.             }
  38.         }
  39.     }
  40.  
  41.     if (headIndex != -1) {
  42.         printf("%d", headIndex);
  43.     } else if (torsoIndex1 != -1 && torsoIndex2 != -1) {
  44.         printf("%d %d", torsoIndex1, torsoIndex2);
  45.     } else {
  46.         printf("abort");
  47.     }
  48.  
  49.     return 0;
  50. }
  51.  
Success #stdin #stdout 0s 5404KB
comments (?)
stdin 
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stdout 
Standard output is empty
https://ideone.com/1I1A3N
language:
C (gcc 8.3)
created:
2 years ago
visibility:
public

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