# a = int(input())
# print(list[a-1])
# n = int(input())
# list = list (map(int,input().split()))
# print (min(list))
# n = int(input())
# list = list(map(int,input().split()))
# print (max(list) - min(list))
# n = int(input())
# # # list = list(map(int,input().split()))
# # # list.reverse()
# # #
# # # for x in list :
# # # print(x,end = ' ')
# list = list(map(int,input().split()))
# a = 0
# for x in list:
# if x%2==1:
# a = a+x
# if a == 0:
# print('-1')
# else:
# print(a)
# a = int (input())
# # list = list(map(int,input().split()))
# # for i in range (a):
# #
# # for j in range (i,a):
# # print(list[j],end = ' ')
# # for j in range (0,i):
# # print(list[j],end = ' ')
# # print()