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#!/usr/bin/env python
""" Solution 1 Perl weekly challenge 074 """
# ===============================================================================
#
# FILE: ch_1.py
#
# USAGE: ./ch_1.py
#
# DESCRIPTION: https://perlweeklychallenge.org/blog/perl-weekly-challenge-074/
#
# TASK #1 › Majority Element
#
# AUTHOR: Lubos Kolouch
# VERSION: 1.0
# CREATED: 08/22/2020 12:40:09 PM
# ===============================================================================
def get_majority_element(arr):
""" Return majority element, if any """
counts = dict()
arr_size_half = len(arr) / 2
for item in arr:
counts[item] = counts.get(item, 0) + 1
if counts[item] > arr_size_half:
return item
return -1
assert get_majority_element([1, 2, 2, 3, 2, 4, 2]) == 2
assert get_majority_element([1, 3, 1, 2, 4, 5]) == -1
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