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  1.  
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  4.  
  5.  
  6. #include <stdio.h>
  7.  
  8. int main() {
  9.     long long a = 6, sum = a;
  10.  
  11.     for (int i = 1; i < 10; i++) {
  12.         a = a * 3 + 1;
  13.         sum += a;
  14.     }
  15.  
  16.     printf("%lld\n", sum);
  17.     return 0;
  18. }
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Success #stdin #stdout 0s 5320KB
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191901
https://ideone.com/tsCEia
language:
C++ (gcc 8.3)
created:
10 hours ago
visibility:
public

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