#include<bits/stdc++.h>
#include <cstring>
#include <iostream>
#define pie acos(-1)
#define si(a) scanf("%d",&a)
#define sii(a,b) scanf("%d %d",&a,&b)
#define siii(a,b,c) scanf("%d %d %d",&a,&b,&c)
#define sl(a) scanf("%lld",&a)
#define sll(a,b) scanf("%lld %lld",&a,&b)
#define slll(a,b,c) scanf("%lld %lld %lld",&a,&b,&c)
#define ss(st) scanf("%s",st)
#define sch(ch) scanf("%ch",&ch)
#define ps(a) printf("%s",a)
#define newLine() printf("\n")
#define pi(a) printf("%d",a)
#define pii(a,b) printf("%d %d",a,b)
#define piii(a,b,c) printf("%d %d %d",a,b,c)
#define pl(a) printf("%lld",a)
#define pll(a,b) printf("%lld %lld",a,b)
#define plll(a,b,c) printf("%lld %lld %lld",a,b,c)
#define pd(a) printf("%lf",a)
#define pdd(a,b) printf("%lf %lf",a,b)
#define pddd(a,b,c) printf("%lf %lf %lf",a,b,c)
#define pch(c) printf("%ch",c)
#define debug1(str,a) printf("%s=%d\n",str,a)
#define debug2(str1,str2,a,b) printf("%s=%d %s=%d\n",str1,a,str2,b)
#define debug3(str1,str2,str3,a,b,c) printf("%s=%d %s=%d %s=%d\n",str1,a,str2,b,str3,c)
#define debug4(str1,str2,str3,str4,a,b,c,d) printf("%s=%d %s=%d %s=%d %s=%d\n",str1,a,str2,b,str3,c,str4,d)
#define for0(i,n) for(i=0;i<n;i++)
#define for1(i,n) for(i=1;i<=n;i++)
#define forab(i,a,b) for(i=a;i<=b;i++)
#define forstl(i, s) for (__typeof ((s).end ()) i = (s).begin (); i != (s).end (); ++i)
#define NL puts("")
#define sd(a) scanf("%lf",&a)
#define sdd(a,b) scanf("%lf %lf",&a,&b)
#define sddd(a,b,c) scanf("%lf %lf %lf",&a,&b,&c)
#define SP printf(" ")
#define LL long long int
#define ULL unsigned long long int
#define N 1000007
#define MOD 100000009
#define pub(x) push_back(x)
#define pob(x) pop_back(x)
#define mem(ara,value) memset(ara,value,sizeof(ara))
#define INF INT_MAX
#define eps 1e-8
#define checkbit(n, pos) (n & (1<<pos))
#define setbit(n, pos) (n | (1<<pos))
#define para(a,b,ara)\
for(int i=a;i<=b;i++){\
    if(i!=0){printf(" ");}\
    printf("%d",ara[i]);\
}\
printf("\n");
#define pvec(vec)\
for(int i=0;i<vec.size();i++){\
    if(i!=0){printf(" ");}\
    printf("%d",vec[i]);\
}\
printf("\n");
#define ppara(n,m,ara)\
for(int i=0;i<n;i++){\
    for(int j=0;j<m;j++){\
        if(j!=0){printf(" ");}\
        printf("%d",ara[i][j]);\
    }\
    printf("\n");\
}
#define ppvec(n,vec)\
for(int i=0;i<n;i++){\
    for(int j=0;j<vec[i].size();j++){\
        if(j!=0){printf(" ");}\
        printf("%d",vec[i][j]);\
    }\
    printf("\n");\
}
#define sara(a,b,ara)\
for(int i=a;i<=b;i++){\
    scanf("%d",&ara[i]);\
}
using namespace std;
int n,ara[2010];
bitset <2010*2010> dp[2];
int sum=0;
void input(){
    int i,j,ans;
    si(n);
    for0(i,n){si(ara[i]);sum+=ara[i];}
    dp[0].set(0);
    for1(i,n){
        dp[i&1]=dp[(i-1)&1]|(dp[(i-1)&1]<<ara[i-1]);
    }
    ans=0;
    for(i=(sum+1)/2;i<2005*2005;i++){
        if(dp[n&1][i]){
            ans=i;
            break;
        }
    }
    pi(ans);NL;
}
int main(){
    input();
    return 0;
}
