#include <vector>
#include <iostream>

using namespace std;

class Solution
{
public:
	int sum(vector<int> &A)
	{
		int sum = 0;
		for (int i = 0; i < A.size(); i++)
			sum += A[i];
		return sum;
	}

	vector<int> fairCandySwap(vector<int> &A, vector<int> &B)
	{
		int diff = (sum(A) - sum(B))/2;
		cout<<diff<<endl;
		for (int i = 0; i < A.size(); i++)
			for (int j = 0; j < B.size(); j++)
				if ((A[i] - B[j]) == diff)
					return vector<int>{A[i], B[j]};
		return vector<int>{0, 0};
	}
};

void outputVector(vector<int> A)
{
	for (int i = 0; i < A.size(); i++)
		cout<<A[i]<<" ";
	cout<<endl;
}

int main() {
	vector<int> A = {2};
	vector<int> B = {1, 3};
	Solution solution = Solution();
	outputVector(solution.fairCandySwap(A, B));
	return 0;
}