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  1. #include <stdio.h>
  2. int main() {
  3.  int a[33];
  4.  int b=0;
  5.  a[0]=2;
  6.  a[1]=-1;
  7.  
  8.  for(int i=2;i<=32;i++){
  9.  	a[i]=-a[i-1]+a[i-2]+2;
  10.  }
  11.  for(int i=0;i<=32;i+=4){
  12.  	b+=a[i];
  13.  }
  14.  printf("a[0]+a[4]+a[8]+...+a[32]=%d\n",b);
  15.     return 0;
  16. }
Success #stdin #stdout 0s 5324KB
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Standard input is empty
stdout
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a[0]+a[4]+a[8]+...+a[32]=7651242
https://ideone.com/rl1hac
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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