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  1. #include <stdio.h>
  2.  
  3. int main(){
  4.     int N;
  5.     scanf("%d", &N);
  6.     int arr[N];
  7.     for (int i = 0; i < N; i++){
  8.         scanf("%d", arr[i]);
  9.     }
  10.     int s;
  11.     for (int i = 0; i < N;  i += 2){
  12.         s += arr[i];
  13.     }
  14.     float d = s / N;
  15.     printf("%f", d);
  16. 	return 0;
  17. }
  18.  
Success #stdin #stdout 0.01s 5264KB
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stdin
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Standard input is empty
stdout
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-263486.000000
https://ideone.com/j2sJzX
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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