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  1. #include <stdio.h>
  2. int main() {
  3.     int arr[31] = {2, -1};
  4.     for (int i = 2; i < 31; i++) 
  5.     arr[i] = (-1)*arr[i-1]+arr[i-2]+2;
  6.     printf("%d", arr[30]);
  7.     return 0;
  8. }
Success #stdin #stdout 0.01s 5288KB
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stdin
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13 30 58 49 38 29 44 12 93 56
stdout
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2496122
https://ideone.com/Qxtjbq
language:
C (gcc 8.3)
created:
18 hours ago
visibility:
public

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