{ "data": { "question": { "questionId": "3234", "questionFrontendId": "2961", "boundTopicId": null, "title": "Double Modular Exponentiation", "titleSlug": "double-modular-exponentiation", "content": "

You are given a 0-indexed 2D array variables where variables[i] = [ai, bi, ci, mi], and an integer target.

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An index i is good if the following formula holds:

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Return an array consisting of good indices in any order.

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Example 1:

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\nInput: variables = [[2,3,3,10],[3,3,3,1],[6,1,1,4]], target = 2\nOutput: [0,2]\nExplanation: For each index i in the variables array:\n1) For the index 0, variables[0] = [2,3,3,10], (23 % 10)3 % 10 = 2.\n2) For the index 1, variables[1] = [3,3,3,1], (33 % 10)3 % 1 = 0.\n3) For the index 2, variables[2] = [6,1,1,4], (61 % 10)1 % 4 = 2.\nTherefore we return [0,2] as the answer.\n
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Example 2:

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\nInput: variables = [[39,3,1000,1000]], target = 17\nOutput: []\nExplanation: For each index i in the variables array:\n1) For the index 0, variables[0] = [39,3,1000,1000], (393 % 10)1000 % 1000 = 1.\nTherefore we return [] as the answer.\n
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Constraints:

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Python 2.7.12.

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C# 10 with .NET 6 runtime

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