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Find Nth fibonacci modulo m

mediumLast edited: September 18, 2025

Problem
Examples
Example 1
Example 2
Solution
Method 1 — Pisano-period detection + iterative Fibonacci
Intuition
Approach
Code
Complexity
Method 2 — Pisano-reduction + fast-doubling Fibonacci
Intuition
Approach
Code (fast-doubling helper + usage)
Complexity
Notes

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Find Nth fibonacci modulo m - Coding Problem | K5kC