{ "data": { "question": { "questionId": "3234", "questionFrontendId": "2961", "categoryTitle": "Algorithms", "boundTopicId": 2559146, "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.

\n\n

An index i is good if the following formula holds:

\n\n\n\n

Return an array consisting of good indices in any order.

\n\n

 

\n

Example 1:

\n\n
\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
\n\n

Example 2:

\n\n
\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
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "双模幂运算", "translatedContent": "

给你一个下标从 0 开始的二维数组 variables ，其中 variables[i] = [ai, bi, ci, mi]，以及一个整数 target 。

\n\n

如果满足以下公式，则下标 i 是 好下标：

\n\n\n\n

返回一个由 好下标 组成的数组，顺序不限 。

\n\n

 

\n\n

示例 1：

\n\n
\n输入：variables = [[2,3,3,10],[3,3,3,1],[6,1,1,4]], target = 2\n输出：[0,2]\n解释：对于 variables 数组中的每个下标 i ：\n1) 对于下标 0 ，variables[0] = [2,3,3,10] ，(23 % 10)3 % 10 = 2 。\n2) 对于下标 1 ，variables[1] = [3,3,3,1] ，(33 % 10)3 % 1 = 0 。\n3) 对于下标 2 ，variables[2] = [6,1,1,4] ，(61 % 10)1 % 4 = 2 。\n因此，返回 [0,2] 作为答案。\n
\n\n

示例 2：

\n\n
\n输入：variables = [[39,3,1000,1000]], target = 17\n输出：[]\n解释：对于 variables 数组中的每个下标 i ：\n1) 对于下标 0 ，variables[0] = [39,3,1000,1000] ，(393 % 10)1000 % 1000 = 1 。\n因此，返回 [] 作为答案。\n
\n\n

 

\n\n

提示：

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