Hackerrank Birthday Cake (I Almost Got but Something Wrong)
For Example, If Your Niece Is Turning 4 Year's Old, and the Cake Will Have 4 Candles of Height 4, 4, 1, 3, She Will Be Able to Blow out 2 Candles Successfully...
For example, if your niece is turning 4 years old, and the cake will have 4 candles of height 4, 4, 1, 3, she will be able to blow out 2 candles successfully, since the tallest candles are of height 4 and there are such 2 candles.
Sample Input
4
3 2 1 3
Sample Output
2
Here's my code
def birthdayCakeCandles(ar):
candle = []
for i in ar:
if ar[i] == max(ar):
candle.append(ar[i])
print(len(candle))
In Pycharm, there's something trouble in """if[i] == max(ar)""" It says index error but I don't know why it causes index error..
1 Answer
You are confusing two concepts on how to iterate through a list.
Also we don't need a list, we just need a variable candles which keeps count of number of valid candles
The first way is to pick each element in the list and use it, we do it by doing for elem in list, where elem=4,4,1..
def birthdayCakeCandles(ar):
candles = 0
#Maximum value in array
max_arr = max(ar)
#a in an element in ar
for a in ar:
if a == max_arr:
candles+=1
print(candles)
The second method is to get the indexes of the list and use those indexes to iterate, i.e. for i in range(len(ar)) where i=0,1,2... etc.
def birthdayCakeCandles(ar):
candles = 0
max_arr = max(ar)
#i is the index in ar
for i in range(len(ar)):
if ar[i] == max_arr:
candles+=1
print(candles)
In both cases, the output is 2
Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.
