leetcode-1512. 好数对的数目

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class Solution {
    public int numIdenticalPairs(int[] nums) {
        int n = nums.length;
        int count = 0;
        for (int i = 0; i < n; i++) {
            for (int j = i + 1; j < n; j++) {
                if (nums[i] == nums[j]) {
                    count++;
                }
            }
        }
        return count;
    }
}