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54
src/main.rs
54
src/main.rs
@ -20,35 +20,35 @@ use std::env;
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use std::collections::VecDeque;
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fn main() {
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let args:Vec<String> = env::args().collect();
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let args:Vec<String> = env::args().collect();
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// get the first `n` primes
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let n:usize = args[1].parse().unwrap();
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let mut primes:VecDeque<u64> = VecDeque::with_capacity(n);
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// first prime
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println!("{}", 2);
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primes.push_back(2);
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// get the first `n` primes
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let n:usize = args[1].parse().unwrap();
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let mut primes:VecDeque<u64> = VecDeque::with_capacity(n);
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// first prime
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println!("{}", 2);
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primes.push_back(2);
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let mut candidate:u64 = 3;
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let mut candidate:u64 = 3;
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while primes.len() < n
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{
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let mut is_prime = true;
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let limit = (candidate as f64).sqrt() as u64;
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for i in primes.iter().take_while(|x| **x <= limit)
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{
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if candidate % *i == 0
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{
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is_prime = false;
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break;
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}
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}
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while primes.len() < n
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{
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let mut is_prime = true;
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let limit = (candidate as f64).sqrt() as u64;
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for i in primes.iter().take_while(|x| **x <= limit)
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{
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if candidate % *i == 0
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{
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is_prime = false;
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break;
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}
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}
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if is_prime
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{
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println!("{}", candidate);
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primes.push_back(candidate);
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}
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candidate += 2;
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}
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if is_prime
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{
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println!("{}", candidate);
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primes.push_back(candidate);
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}
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candidate += 2;
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}
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}
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