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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. /*
  5. Constraints: n <= 100000
  6. This program:
  7. 1. Reads an array of n integers.
  8. 2. Calculates the sum of all elements.
  9. 3. Finds the maximum element.
  10. 4. Counts how many even numbers are in the array.
  11. */
  12.  
  13. int main() {
  14.   int n;
  15.   cin >> n;
  16.  
  17.   int a[n];
  18.  
  19.   // Input loop
  20.   for (int i = 0; i < n; ++i) {
  21.     cin >> a[i];
  22.   }
  23.  
  24.   // First loop: Calculate the sum
  25.   long long sum = 0;
  26.   for (int i = 0; i < n; ++i) {
  27.     sum += a[i];
  28.   }
  29.  
  30.   // Second loop: Find the maximum element
  31.   int maxElement = a[0];
  32.   for (int i = 1; i < n; ++i) {
  33.     if (a[i] > maxElement) {
  34.       maxElement = a[i];
  35.     }
  36.   }
  37.  
  38.   // Third loop: Count even numbers
  39.   int evenCount = 0;
  40.   for (int i = 0; i < n; ++i) {
  41.     if (a[i] % 2 == 0) {
  42.       evenCount++;
  43.     }
  44.   }
  45.  
  46.   // Output the results
  47.   cout << "Sum = " << sum << "\n";
  48.   cout << "Max = " << maxElement << "\n";
  49.   cout << "Even Count = " << evenCount << "\n";
  50.  
  51.   return 0;
  52. }
  53.  
Success #stdin #stdout 0.01s 5324KB
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stdin
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5
2 4 6 4 1
stdout
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Sum = 17
Max = 6
Even Count = 4
https://ideone.com/4qQBoa
5
2 4 6 4 1
language:
C++14 (gcc 8.3)
created:
7 days ago
visibility:
public

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