def solve(arr):
# while True:
#
#
#
#
#
#
# t = arr[1:3]
# t.reverse()
# arr[1:3] = t
# s = arr[0]+arr[1]
# return s
#
# data = []
# n = int(input())
# for i in range(1):
# v = input().split()
# for j in range(len(v)):
# v[j] = int(v[j])
# data = v
# print(solve(data))
#
# # data = [1,2,3,4,5]
# # # 1 4 3 2 5
# # v = data[1:4]
# # v.reverse()
# # data[1:4] = v