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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.     int a0 = 1, a1 = 2, a2;
  5.     int b = 0;
  6.  
  7.     if (100 <= a0 && a0 <= 1000) b++;
  8.     if (100 <= a1 && a1 <= 1000) b++;
  9.  
  10.     while (1) {
  11.         a2 = 3 * a1 + 2 * a0;
  12.  
  13.  
  14.         if (a2 > 1000) break;
  15.  
  16.  
  17.         if (a2 >= 100) b++;
  18.  
  19.  
  20.         a0 = a1;
  21.         a1 = a2;
  22.     }
  23.  
  24.     printf("%d\n", b);
  25.  
  26.     return 0;
  27. }
  28.  
  29.  
Success #stdin #stdout 0s 5320KB
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https://ideone.com/UZo2nZ
language:
C (gcc 8.3)
created:
7 hours ago
visibility:
public

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