UVA_562_Dividing coins

#include<iostream>  
#include<sstream>  
#include<string>  
#include<vector>  
#include<list>  
#include<set>  
#include<map>  
#include<stack>  
#include<queue>  
#include<algorithm>  
#pragma warning(disable:4996)  
using std::cin;
using std::cout;
using std::endl;
using std::stringstream;
using std::string;
using std::vector;
using std::list;
using std::pair;
using std::set;
using std::multiset;
using std::map;
using std::multimap;
using std::stack;
using std::queue;
using std::priority_queue;
int main()
{
	//freopen("input.txt", "r", stdin);  
	//freopen("output.txt", "w", stdout);  
	int T;
	while (cin >> T)
	{
		while (T--)
		{
			int n; cin >> n;
			vector<int>coin(n);
			int sum = 0;
			for (int i = 0; i < n; i++)
			{
				cin >> coin[i];
				sum += coin[i];
			}
			vector<bool>available(sum+1);
			available[0] = available[sum] = true;
			for (int i = 0; i < n; i++)
			{
				for (int j = sum; j >= coin[i]; j--)
				{
					if (!available[j])
					{
						available[j] = available[j - coin[i]];
					}
				}
			}
			for (int i = sum / 2; 1; i--)
			{
				if (available[i])
				{
					cout << sum - 2 * i << endl;
					break;
				}
			}
		}
	}
	return 0;
}