Class Solution
java.lang.Object
g1501_1600.s1512_number_of_good_pairs.Solution
public class Solution
extends java.lang.Object
1512 - Number of Good Pairs.
Easy
Given an array of integers nums
, return the number of good pairs.
A pair (i, j)
is called good if nums[i] == nums[j]
and i
< j
.
Example 1:
Input: nums = [1,2,3,1,1,3]
Output: 4
Explanation: There are 4 good pairs (0,3), (0,4), (3,4), (2,5) 0-indexed.
Example 2:
Input: nums = [1,1,1,1]
Output: 6
Explanation: Each pair in the array are good.
Example 3:
Input: nums = [1,2,3]
Output: 0
Constraints:
1 <= nums.length <= 100
1 <= nums[i] <= 100
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Constructor Summary
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Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Constructor Details
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Solution
public Solution()
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Method Details
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numIdenticalPairs
public int numIdenticalPairs(int[] nums)
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