import sys
n=int(input())
a=input()
for c in a:
  if c<'0' or c>'9':
    print("\"assert\"")
    sys.exit()
a1=int(a)
a2=int(input())
a3=int(input())
x=[a1+a2, a2+a3, a3+a1]
x.sort()
if x[1]==x[2]:
  print(x[0])
else:
  print(x[1])