We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
  1. Prepare
  2. Python
  3. Collections
  4. Piling Up!
  5. Discussions

Piling Up!

  • sachinsreekumar1
     + 0 comments

    N = int(input())

    for _ in range(N):

    nos = int(input())
in_list = input().split()
start = int(in_list[0])
end = int(in_list[-1])
if start<end:
    val = end
    in_list.pop(-1)
else:
    val = start
    in_list.pop(0)

while len(in_list)>0:
    start = int(in_list[0])
    end = int(in_list[-1])
    if val>=end and end>=start:
        val = end
        in_list.pop(-1)
    elif val>=start and start>=end:
        val = start
        in_list.pop(0)
    else:
        print("No")
        break

if len(in_list)==0:
    print("Yes")