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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int n;
  6. long long a[(int)(1e3) + 10], sum = 0;
  7.  
  8. int main()
  9. {
  10.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  11.  
  12.     cin >> n;
  13.     for (int i = 1; i <= n; i++)
  14.         cin >> a[i];
  15.     for (int i = 1; i <= n; i++)
  16.         sum += a[i];
  17.     cout << fixed << setprecision(3) << 1.0 * sum / n;
  18. }
Success #stdin #stdout 0.01s 5280KB
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Standard input is empty
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-nan
https://ideone.com/xHoNrk
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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