sdasdasd

#include <iostream>
#include <array>
#include <vector>

const int maxSize = 100;

std::array<int, maxSize> readInput(int& arrSize) {
	std::array<int, maxSize> arr{};
	std::cin >> arrSize;
	for (int i = 0; i < arrSize; ++i) {
		std::cin >> arr[i];
	}
	return arr;
}

int findAverage(std::array<int, maxSize>& nums, int& arrSize, int& average) {
	int sum = 0;
	for (int i = 0; i < arrSize; ++i) {
		sum += nums[i];
	}
	average = sum / arrSize;
	return average;
}

std::vector<int> removeUnderAverage(std::array<int, maxSize>& nums, int& arrSize, std::vector<int>& underAverage, int& average) {
	for (int i = 0; i < arrSize; ++i) {
		if (nums[i] <= average) {
			underAverage.push_back(nums[i]);
		}
	}
	return underAverage;
}

void findOddAndEvenSum(std::vector<int>& underAverage) {
	int evenSum = 0;
	int oddSum = 0;
	for (int i = 0; i < underAverage.size(); ++i) {
		if (i % 2 == 0) {
			evenSum += underAverage[i];
		}
		else {
			oddSum += underAverage[i];
		}
	}

	std::cout << evenSum * oddSum;
}

int main() {
	int arrSize = 0;
	std::array<int, maxSize> nums = readInput(arrSize);

	int average = 0;
	findAverage(nums, arrSize, average);

	std::vector<int> underAverage;
	removeUnderAverage(nums, arrSize, underAverage, average);

	findOddAndEvenSum(underAverage);
}