Programmer Think

Example: consecutive interval number Xiao Ming has been thinking about such a strange and interesting question these days: How many consecutive intervals are there in an arrangement of 1 ∼ N? The definition of the serial interval here is: If all the elements in the interval [L,R] (i.e. the L-th to r-th elements of this arrangement) can ...

0x00 topic source Special topics in Mathematics 0x10 Tag Mathematics, prime, Euler sieve 0x20 1001 prime judgment Give a number x, judge whether it is a prime number, and output all its prime factors. 0x21 prime sieve (Euler sieve) The boards are as follows: bool isnp[MAXN]; vector<int> primes; void init(int n) { for (i ...

Title: Everyone must have played the "fruit ninja" game popular all over the world in 2010? (it doesn't matter if you haven't played ~) in the game, a series of fruits and bombs will be ejected randomly in the screen. Players can complete the tasks specified in the game by cutting off all fruits as much as possible to avoid hitting t ...

Learning materials related to this training:         Euler function -- the number of Coprime numbers with N in numbers less than n         Game theory and algorithm implementation (three basic games)         Fast power (Java implementation code) catalogue A - A^B Mod C B - inverse element C - number of decision primes D - matrix ...

All the number theory knowledge involved below proves portal 1 All the number theory knowledge involved below proves Portal 2 C Looooops description solution Transform the meaning of the question into a mathematical formula A + C ...

Title Link subject single! Still single! GIGO is still single! DS code Nong Jige is still single! Therefore, he hates Valentine's day most in his life. Whether it's \ (214 \) or \ (77 \), he hates it! GIGO observed the two numbers \ (214 \) and \ (77 \), and found that: \(2+1+4=7\) \(7+7=7×2\) \(77=7 × 11\) Finally, he found that all this was d ...

preface Just call me Shen Qi. Recently, I have gained a lot from watching the video of AcWing algorithm basic course. So I decided to open up the algorithm section and officially began to sort out the algorithm notes and clarify my ideas. This time, we brought prime bucket. Hey, hey. Each part will be matched with the corresponding exerci ...

meaning of the title n × m × l n\times m\times l n × m × l lattice cubes, filled randomly 1 1 ...

subject Portal to LOJ thinking This question is really, really, really, really outrageous. Better from k = 2 k=2 k=2 start. First of all, we need to think of such a thing: multiple vectors and multiple vectors, fi ...

1. Arithmetic Progression of Primes (20 points) In mathematics, an arithmetic progression (AP, equal difference column) is a sequence of numbers such that the difference between the consecutive terms is constant. In 2004, Terence Tao and Ben Green proved that for any positive n ...