#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
int n,r[40];
bitset<10400001> dp[26];
int main(){
	cin>>n;
	for(int i=0;i<n;i++){
		cin>>r[i];
	}
	if(n>=26){
		cout<<"0\n";
		return 0;
	}
	for(int i=0;i<n;i++){
		for(int j=1;j<26;j++){
			if(abs(j-13)>(n-i))continue;
			if(abs(j-13)>i)continue;
			dp[j-1]|=dp[j]>>r[i];
		}
		for(int j=26;j--;){
			if(abs(j-13)>(n-i))continue;
			if(abs(j-13)>i)continue;
			dp[j+1]|=dp[j]<<r[i];
		}
		dp[14][5200000+r[i]]=1;
	}
	int ans=800001;
	for(int i=4400000;i<6000001;i++)if(dp[13][i])ans=min(ans,abs(i-5200000));
	cout<<ans<<"\n";
}