Good Pair

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Given an array of $N$ elements $A_1,A_2,A_3...A_N$. A pair $(A_i,A_j)$ is said to be good if $i<=j$ and $A_i-A_j=A_i*A_j$. Find the number of good pairs in the array. ###Input: - First line will contain $T$, number of testcases. Then the testcases follow. - Each testcase contains of two lines of input, an integer $N$ and $N$ space separated integers $A_1,A_2,A_3...A_N$. ###

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solution.cppC++17

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