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Copy pathvalid_string.py
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68 lines (62 loc) · 2.47 KB
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#!/usr/bin/env python3
"""
https://www.hackerrank.com/challenges/sherlock-and-valid-string/problem
"""
from collections import defaultdict
import sys
def is_valid(s):
if len(s) == 1:
return 'YES'
freq_chars = defaultdict(int)
for i in range(len(s)):
freq_chars[s[i]] += 1
print(freq_chars)
freq_freq = defaultdict(int)
for val in freq_chars.values():
freq_freq[val] += 1
print(freq_freq)
if len(freq_freq) == 1:
return 'YES'
elif len(freq_freq) == 2:
# one of key values should be 1
# the one which is 1 should have key ==1 or > other key
# and greater - smaller = 1
key_list = list(freq_freq.keys())
k1, v1 = key_list[0], freq_freq[key_list[0]]
k2, v2 = key_list[1], freq_freq[key_list[1]]
if v1 == 1: # and abs(k1 - k2) == 1:
if (k1 > k2 and abs(k1 - k2) == 1) or k1 == 1:
return 'YES'
else:
return 'NO'
elif v2 == 1: # and abs(k1 - k2) == 1:
if (k2 > k1 and abs(k1 - k2) == 1) or k2 == 1:
return 'YES'
else:
return 'NO'
else:
return 'NO'
else:
return 'NO'
if __name__ == '__main__':
# print("python version: " + sys.version)
s = "ibfdgaeadiaefgbhbdghhhbgdfgeiccbiehhfcggchgghad" \
"hdhagfbahhddgghbdehidbibaeaagaeeigffcebfbaieggabcfbiie" \
"dcabfihchdfabifahcbhagccbdfifhghcadfiadeeaheeddddiecaicb" \
"gigccageicehfdhdgafaddhffadigfhhcaedcedecafeacbdacgfgfeei" \
"bgaiffdehigebhhehiaahfidibccdcdagifgaihacihadecgifihbebffe" \
"bdfbchbgigeccahgihbcbcaggebaaafgfedbfgagfediddghdgbgehhhif" \
"hgcedechahidcbchebheihaadbbbiaiccededchdagfhccfdefigfibifabe" \
"iaccghcegfbcghaefifbachebaacbhbfgfddeceababbacgffbagidebeadf" \
"ihaefefegbghgddbbgddeehgfbhafbccidebgehifafgbghafacgfdccgifd" \
"cbbbidfifhdaibgigebigaedeaaiadegfefbhacgddhchgcbgcaeaieiegiff" \
"chbgbebgbehbbfcebciiagacaiechdigbgbghefcahgbhfibhedaeeiffebdi" \
"abcifgccdefabccdghehfibfiifdaicfedagahhdcbhbicdgibgcedieihcich" \
"adgchgbdcdagaihebbabhibcihicadgadfcihdheefbhffiageddhgahaidfd" \
"hhdbgciiaciegchiiebfbcbhaeagccfhbfhaddagnfieihghfbaggiffbbfbe" \
"cgaiiidccdceadbbdfgigibgcgchafccdchgifdeieicbaididhfcfdedbhaa" \
"dedfageigfdehgcdaecaebebebfcieaecfagfdieaefdiedbcadchabhebgeh" \
"iidfcgahcdhcdhgchhiiheffiifeegcfdgbdeffhgeghdfhbfbifgidcafbfcd"
# s = "aaaabbcc"
s = "aaaabb"
print(is_valid(s))