{ "data": { "question": { "questionId": "2722", "questionFrontendId": "2614", "boundTopicId": null, "title": "Prime In Diagonal", "titleSlug": "prime-in-diagonal", "content": "
You are given a 0-indexed two-dimensional integer array nums
.
Return the largest prime number that lies on at least one of the diagonals of nums
. In case, no prime is present on any of the diagonals, return 0.
Note that:
\n\n1
and has no positive integer divisors other than 1
and itself.val
is on one of the diagonals of nums
if there exists an integer i
for which nums[i][i] = val
or an i
for which nums[i][nums.length - i - 1] = val
.In the above diagram, one diagonal is [1,5,9] and another diagonal is [3,5,7].
\n\n\n
Example 1:
\n\n\nInput: nums = [[1,2,3],[5,6,7],[9,10,11]]\nOutput: 11\nExplanation: The numbers 1, 3, 6, 9, and 11 are the only numbers present on at least one of the diagonals. Since 11 is the largest prime, we return 11.\n\n\n
Example 2:
\n\n\nInput: nums = [[1,2,3],[5,17,7],[9,11,10]]\nOutput: 17\nExplanation: The numbers 1, 3, 9, 10, and 17 are all present on at least one of the diagonals. 17 is the largest prime, so we return 17.\n\n\n
\n
Constraints:
\n\n1 <= nums.length <= 300
nums.length == numsi.length
1 <= nums[i][j] <= 4*106
Compiled with clang 11
using the latest C++ 20 standard.
Your code is compiled with level two optimization (-O2
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Most standard library headers are already included automatically for your convenience.
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Python 2.7.12
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Node.js 16.13.2
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