Question

Find four elements i,j,k and l in an array such that i+j=k+l

Answer 1

Input: {3, 4, 7, 1, 2, 9, 8}

Output: (3, 8) and (4, 7)

Explanation: 3+8 = 4+7

Input: {3, 4, 7, 1, 12, 9};

Output: (4, 12) and (7, 9)

Explanation: 4+12 = 7+9

Input: {65, 30, 7, 90, 1, 9, 8};

Output: No pairs found

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