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  1. Prepare
  2. Python
  3. Collections
  4. Piling Up!
  5. Discussions

Piling Up!

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987 Discussions

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  • 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")

  • as2718
     + 0 comments
    for _ in range(int(input())):
    n = int(input())
    s = list(map(int,input().split()))
    pair=[]
    midval=-1
    for i in range(len(s)//2):
        pair.append((s[i],s[-(i+1)]))
    flag="Yes"
    global_current=pair
    for i in range(1,len(pair)):
        prev=pair[i-1]
        curr=pair[i]
        if (curr[0]>prev[0] and  curr[0]>prev[1]) or (curr[1]>prev[0] and  curr[1]>prev[1]):
            flag="No"
            global_current=curr
    if len(s)%2==1 and flag=="Yes":
        midval=s[len(s)//2]
        if midval>global_current[0][0] and midval>global_current[0][1]:
            flag="No"
    print(flag)

  • dheenupriya2001
     + 0 comments
    t = int(input())
for _ in range(t):
    n = int(input())
    blocks = list(map(int, input().split()))
    left, right = 0, n - 1
    last = float('inf')   # start with "infinity" (no restriction yet)
    ok = True
    
    while left <= right:
        # choose the bigger cube from either end
        if blocks[left] >= blocks[right]:
            curr = blocks[left]
            left += 1
        else:
            curr = blocks[right]
            right -= 1
        
        # check if it's valid
        if curr > last:
            ok = False
            break
        last = curr
    
    print("Yes" if ok else "No")

  • Hungmagicboy123
     + 0 comments

    T = int(input()) for j in range(T): n = int(input()) blocks = list(map(int, input().split())) result = True left, right = 0, n-1 top = float('inf') while left <= right: if blocks[left] <= top and (blocks[left] >= blocks[right]): top = blocks[left] left += 1 elif blocks[right] <= top: top = blocks[right] right -= 1 else: result = False break

    print("Yes" if result else "No")

  • nguyenducthong11
     + 1 comment

    Here, it's my code!

    for _ in range(int(input())):
    n = int(input())
l = list(map(int,input().split()))
result = "Yes"
for i in range(1,n-1):
    if(l[i] > l[i-1] and l[i] > l[i+1]):
        result = "No"
        break
print(result)