#include <math.h>
#include <string.h>
#include <stdio.h>

char memo[3][500100];

int main(void){
	int i,j,n;
	int v[1100]={0};
	int mp = 2;
	int vmax=1;
	
	scanf("%d", &n);
	
	memo[0][0] = 1;
	memo[1][0] = 1;
	memo[2][0] = 1;
	
	
	for(i=1;i<=n;i++){
		scanf("%d", &v[i]);
		for(j=vmax;j>=0;j--){
			memo[mp][j] = memo[(mp+2)%3][j];
			if(memo[(mp+1)%3][j] == 1){
				memo[mp][j+v[i]] = 1;
				if(vmax < j+v[i]){
					vmax = j+v[i];
				}
			}
		}
		mp = (mp+1)%3;
	}
	
	
	printf("%d\n", vmax);
	return 0;
}