#include <bits/stdc++.h>
using namespace std;
int n,r[40];
bitset<16000001> dp[41];
int main(){
	cin>>n;
	for(int i=0;i<n;i++){
		cin>>r[i];
	}
	for(int i=0;i<n;i++){
		for(int j=1;j<41;j++){
			if(abs(j-20)>(n-i))continue;
			if(abs(j-20)>i)continue;
			dp[j-1]|=dp[j]>>r[i];
		}
		for(int j=40;j--;){
			if(abs(j-20)>(n-i))continue;
			if(abs(j-20)>i)continue;
			dp[j+1]|=dp[j]<<r[i];
		}
		dp[21][8000000+r[i]]=1;
	}
	int ans=800001;
	for(int i=7200000;i<8800001;i++)if(dp[20][i])ans=min(ans,abs(i-8000000));
	cout<<ans<<"\n";
}