find_lucky_integer_array.py (877B)
| # 1394. Find Lucky Integer in an Array
from collections import Counter
"""
given an array of integers 'arr', a lucky integer is an integer equal that
has a frequency in the array equal to its value. return the largest lucky
integer in the array. if there is no lucky integer, return -, a lucky integer
is an integer equal that has a frequency in the array equal to its value.
return the largest lucky integer in the array. if there is no lucky integer,
return -1
"""
class Solution(object):
def findLucky(self, arr):
"""
:type arr: List[int]
:rtype: int
"""
cnt = Counter(arr)
return max([i for i, j in cnt.items() if i == j] + [-1])
if __name__ == "__main__":
obj = Solution()
print(obj.findLucky(arr=[2, 2, 3, 4]))
print(obj.findLucky(arr=[1, 2, 2, 3, 3, 3]))
print(obj.findLucky(arr=[2, 2, 2, 3, 3]))
|
