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// Zadanie 1 Lopatin Timofey ID - 324
int sumEven(List<int> nums) {
  int sum = 0;

  for (int number in nums) {
    if (number % 2 == 0) {
      sum = sum + number;
    }
  }

  return sum;
}

void main() {
  List<int> numbers = [];

  for (int i = 1; i <= 50; i++) {
    numbers.add(i);
  }

  print(sumEven(numbers));
}