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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 = err * 15; // 1 mil error for head width of 15 cm
  11.     int minTorsoError = err * 35; // 1 mil error for torso width of 35 cm
  12.  
  13.     int minHeadIndex = -1;
  14.     int minTorsoIndex1 = -1;
  15.     int minTorsoIndex2 = -1;
  16.  
  17.     for (int i = 0; i < n; ++i) {
  18.         int x, y;
  19.         scanf("%d %d", &x, &y);
  20.  
  21.         int distanceSquared = (x - Tx) * (x - Tx) + (y - Ty) * (y - Ty);
  22.  
  23.         if (distanceSquared <= minHeadError * minHeadError) {
  24.             // Sniper can hit the target in the head
  25.             minHeadIndex = i;
  26.             break;
  27.         } else if (distanceSquared <= minTorsoError * minTorsoError) {
  28.             // Sniper can hit the target in the torso
  29.             if (minTorsoIndex1 == -1) {
  30.                 minTorsoIndex1 = i;
  31.             } else {
  32.                 minTorsoIndex2 = i;
  33.                 break;
  34.             }
  35.         }
  36.     }
  37.  
  38.     if (minHeadIndex != -1) {
  39.         printf("%d\n", minHeadIndex);
  40.     } else if (minTorsoIndex2 != -1) {
  41.         printf("%d %d\n", minTorsoIndex1, minTorsoIndex2);
  42.     } else {
  43.         printf("abort\n");
  44.     }
  45.  
  46.     return 0;
  47. }
  48.  
Success #stdin #stdout 0s 5532KB
comments (?)
stdin 
20
3
0 0
-500 1500
1000 200
3000 1000
stdout 
abort
https://ideone.com/Y59QCo
language:
C (gcc 8.3)
created:
2 years ago
visibility:
public

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