#include <iostream>
#include <cmath>


using namespace std;

int main() {

	int n;
	cin >> n;

	int evenSum = 0;
	int oddSum = 0;
	//1 <= num

	//if( i % 2 == 0)
	for (int i = 1; i <= n; i++)
	{
		int inputNumber;
		cin >> inputNumber;

		if (i % 2 == 0)
		{
			evenSum += inputNumber;
		}
		else
		{
			oddSum += inputNumber;
		}

	}

	if (evenSum == oddSum)
	{
		cout << "Yes" << endl;
		cout << "Sum = " << evenSum;
	}
	else
	{
		cout << "No" << endl;
		cout << "Diff = " << abs(evenSum - oddSum);
	}

	return 0;
}