N=input();D=map(int,raw_input().split());T=1<<N
H=[0]*T;MH=[0]*T;H[0]=MH[0]=100
for i in xrange(T):
	if H[i]<=0:continue
	for j in xrange(N):
		b=1<<j
		if b&i:continue
		n=b+i;h=min(H[i]+D[j],MH[i])
		H[n]=max(H[n],h);MH[n]=MH[i]+100*(D[j]<0)
print H[T-1]