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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.     int N, A[1000], X, count = 0;
  5.  
  6.     scanf("%d", &N);
  7.  
  8.     A[1] = -1;
  9.     for (int i = 2; i <= N; i++) {
  10.         scanf("%d", &A[i]);
  11.     }
  12.  
  13.     scanf("%d", &X);
  14.  
  15.     for (int i = 1; i <= N; i++) {
  16.         if (i == X) {
  17.             continue;
  18.         }
  19.  
  20.         int now = i;
  21.  
  22.         while (A[now] != -1) {
  23.             now = A[now];
  24.  
  25.             if (now == X) {
  26.                 count++;
  27.                 break;
  28.             }
  29.         }
  30.     }
  31.  
  32.     printf("%d\n", count);
  33.     return 0;
  34. }
Success #stdin #stdout 0s 5328KB
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https://ideone.com/zfJkRx
language:
C (gcc 8.3)
created:
4 hours ago
visibility:
public

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