012 ok

012/main.rs

@@ -2,8 +2,6 @@ use std::fs::File;
 use std::io::{ self, BufRead, BufReader };
 
 
-const PS_SIZE: usize = 500usize;
-
 fn get_ps() -> Vec<u32> {
     let file = File::open("primes.txt").unwrap();
     let lines = io::BufReader::new(file).lines();
@@ -11,11 +9,23 @@ fn get_ps() -> Vec<u32> {
                 .collect();
 }
 
-fn divs_num_test(n: u32) -> u32 {
+fn div_num(ps: &Vec<u32>, n: u32) -> u32 {
+    fn max_div(m: u32, k: u32) -> u32 {
         let mut res = 0;
-    for i in 1..n {
+        let mut mm = m;
-        if n % i == 0 { res += 1; }
+        while mm % k == 0 {
+            mm /= k;
+            res += 1;
+        }
+        res
+    }
+
+    let mut res = 1;
+    for p in ps {
+        let md = max_div(n, *p) + 1;
+        res *= md;
     }
+
     return res;
 }
 
@@ -23,12 +33,12 @@ fn main() {
     let ps = get_ps();
     let mut n = 1;
     let mut best_dn = 1;
-    for k in 2..50000 {
+    for k in 2..80000 {
         n += k;
-        let dn = 500; //500; //divs_num(n);
+        let dn = div_num(&ps, n);
-        //if dn > best_dn {
+        if dn > best_dn {
-        //    best_dn = dn;
+            best_dn = dn;
-            //println!("[{}]{}:{}",k, n, dn);
+            println!("[{}]{}:{}", k, n, dn);
-        //}
+        }
     }
 }

012/main_basic.rs

@@ -1,12 +1,6 @@
-use std::fs::File;
+fn div_num(n: u32) -> u32 {
-use std::io::{ self, BufRead, BufReader };
-
-const PS_SIZE: usize = 500usize;
-
-
-fn divs_num(n: u32) -> u32 {
     let mut res = 0;
-    for i in 1..n {
+    for i in 1..=n {
         if n % i == 0 { res += 1; }
     }
     return res;
@@ -17,7 +11,7 @@ fn main() {
     let mut best_dn = 1;
     for k in 2..50000 {
         n += k;
-        let dn = divs_num(n);
+        let dn = div_num(n);
         if dn > best_dn {
             best_dn = dn;
             println!("[{}]{}:{}",k, n, dn);