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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. int main() {
  5.     int err, n, Tx, Ty;
  6.     scanf("%d", &err);
  7.     scanf("%d", &n);
  8.     scanf("%d %d", &Tx, &Ty);
  9.  
  10.     int minHeadError = 1000000;
  11.     int minTorsoError = 1000000;
  12.     int headIndex = -1, torsoIndex1 = -1, torsoIndex2 = -1;
  13.  
  14.     for (int i = 0; i < n; ++i) {
  15.         int x, y;
  16.         scanf("%d %d", &x, &y);
  17.         int distanceSquared = (x - Tx) * (x - Tx) + (y - Ty) * (y - Ty);
  18.         int milError = sqrt(distanceSquared) * 1000 / 100; // convert to mils
  19.  
  20.         int headWidth = 15 * 100; // 15 centimeters to millimeters
  21.         int torsoWidth = 35 * 100; // 35 centimeters to millimeters
  22.  
  23.         if (milError <= err) {
  24.             if (2 * milError <= headWidth && milError < minHeadError) {
  25.                 minHeadError = milError;
  26.                 headIndex = i;
  27.             } else if (2 * milError <= torsoWidth && milError < minTorsoError) {
  28.                 if (torsoIndex1 == -1) {
  29.                     torsoIndex1 = i;
  30.                 } else {
  31.                     torsoIndex2 = i;
  32.                 }
  33.                 minTorsoError = milError;
  34.             }
  35.         }
  36.     }
  37.  
  38.     if (headIndex != -1) {
  39.         printf("%d", headIndex);
  40.     } else if (torsoIndex1 != -1 && torsoIndex2 != -1) {
  41.         if (torsoIndex1 < torsoIndex2) {
  42.             printf("%d %d", torsoIndex1, torsoIndex2);
  43.         } else {
  44.             printf("%d %d", torsoIndex2, torsoIndex1);
  45.         }
  46.     } else {
  47.         printf("abort");
  48.     }
  49.  
  50.     return 0;
  51. }
  52.  
Success #stdin #stdout 0s 5392KB
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https://ideone.com/j6LB9a
language:
C (gcc 8.3)
created:
2 years ago
visibility:
public

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