Given an array of size n-1 filled with elements from 1 to n with one missing number. Find that missing number using divide and conquer.
I google it and found many binary search algorithms but couldn't find any divide and conquer approach. Anybody know how to solve it.
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Codeforces (c) Copyright 2010-2024 Михаил Мирзаянов
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Время на сервере: 20.09.2024 16:31:20 (k1).
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if anyone knows i'm also interested in solutions using dynamic prorgramming, maxflow, fft and the gröbner basis... please help!!
Use FFT/DC to get $$$(x - a_1)(x - a_2) \cdots (x - a_{n - 1})$$$ and then multi-point evaluation on $$$1, 2, \dots, n$$$ to find which one is non-zero.
Wow, that sword got through the heart of fly ;)