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  1. #include <stdio.h>
  2.  
  3. int process(int n, int *count) {
  4.     static int cache[100] = {0};
  5.     (*count)++;
  6.  
  7.     if (n <= 1) return n;
  8.     if (cache[n] != 0) return cache[n];
  9.  
  10.     int result;
  11.     if (n % 2 == 0) {
  12.         result = process(n / 2, count) + process(n / 2 - 1, count);
  13.     } else {
  14.         result = process(n - 1, count) - process(n - 2, count);
  15.     }
  16.  
  17.     cache[n] = result;
  18.     return result;
  19. }
  20.  
  21. int main() {
  22.     int count = 0;
  23.     int result = process(12, &count);
  24.     printf("%d %d\n", result, count);
  25.  
  26.     count = 0;
  27.     result = process(12, &count);
  28.     printf("%d %d\n", result, count);
  29.     return 0;
  30. }
Success #stdin #stdout 0s 5292KB
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3 15
3 1
https://ideone.com/vW1lMi
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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