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

Piling Up!

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985 Discussions

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  • 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)

  • Reshmafredy999
     + 0 comments
    # Enter your code here. Read input from STDIN. Print output to STDOUT
from collections import deque
if __name__ == '__main__':
    T = int(input())
    for _ in range(T):
        n = int(input())
        cube = deque(map(int,input().split()))
        ans = True
        last = max(cube)
        
        while cube:
            if cube[0] >= cube[-1]:
                current = cube.popleft()
            else:
                current = cube.pop()
                
            if last is None or current <= last:
                last = current
            else:
                ans = False
                break
        print("Yes" if ans else "No")

  • devin1423
     + 0 comments

    The description of this is terrible. This is what it's trying to ask of you.

    You’re given a row of cubes, each with a length. You can only pick cubes from either end — leftmost or rightmost — one at a time. Your goal is to stack them vertically, so that each cube you place is not longer than the one below it. In other words: - You’re building a pile from bottom to top. - Each new cube must be equal to or smaller than the one you just placed. - You can only pick from the ends of the row — no grabbing from the middle.