[217] Contains Duplicate
https://leetcode.com/problems/contains-duplicate/description/
- algorithms
- Easy (49.56%)
- Source Code: 217.contains-duplicate.py
- Total Accepted: 321.3K
- Total Submissions: 624.3K
- Testcase Example: '[1,2,3,1]'
Given an array of integers, find if the array contains any duplicates.
Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct.
Example 1:
Input: [1,2,3,1] Output: true
Example 2:
Input: [1,2,3,4] Output: false
Example 3:
Input: [1,1,1,3,3,4,3,2,4,2] Output: true
python
class Solution(object):
def containsDuplicate(self, nums):
"""
:type nums: List[int]
:rtype: bool
"""
table = {}
for n in nums:
if n not in table: table[n] = 1
else:
return True
return False