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class Solution {
public:
    int countPairs(vector<int>& nums, int k) {
        int n=nums.size();
        int c=0;
        for(int i=0;i<n-1;i++)
        {
            for(int j=i+1;j<n;j++)
            {
                int p=i*j;
                if(nums[i]==nums[j]&&p%k==0) c++;
            }
        }
        return c;
    }
};
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