class Solution:
def singleNumber(self, nums: List[int]) -> int:
h = {}
for i in nums:
if i in h:
h[i]+=1
else:
h[i] = 1
for i in h:
if h[i]==1:
return i
1372A - Omkar and Completion | 159D - Palindrome pairs |
981B - Businessmen Problems | 1668A - Direction Change |
1667B - Optimal Partition | 1668B - Social Distance |
88B - Keyboard | 580B - Kefa and Company |
960A - Check the string | 1220A - Cards |
897A - Scarborough Fair | 1433B - Yet Another Bookshelf |
1283B - Candies Division | 1451B - Non-Substring Subsequence |
1408B - Arrays Sum | 1430A - Number of Apartments |
1475A - Odd Divisor | 1454B - Unique Bid Auction |
978C - Letters | 501B - Misha and Changing Handles |
1496A - Split it | 1666L - Labyrinth |
1294B - Collecting Packages | 1642B - Power Walking |
1424M - Ancient Language | 600C - Make Palindrome |
1669D - Colorful Stamp | 1669B - Triple |
1669A - Division | 1669H - Maximal AND |