From a1ff92c72ec761b1095cc69910dbab77706dc0cb Mon Sep 17 00:00:00 2001
From: Coin de Gamma <cg@corpglory.com>
Date: Wed, 3 Jan 2024 18:11:09 +0000
Subject: [PATCH] 051 ok

---
 051/main.rs | 184 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 184 insertions(+)
 create mode 100644 051/main.rs

diff --git a/051/main.rs b/051/main.rs
new file mode 100644
index 0000000..eb8657b
--- /dev/null
+++ b/051/main.rs
@@ -0,0 +1,184 @@
+use std::collections::HashSet;
+
+fn er() -> Vec<u32> {
+    let mut nums = Vec::new();
+    let size = 1000000;
+    for n in 0..size+1 { nums.push(true); }
+    let mut p = 1;
+    loop {
+        let mut found = false;
+        for i in p+1..size {
+            if nums[i] {
+                found = true;
+                p = i;
+                break;
+            }
+        }
+        if !found { break; }
+        for i in (2 * p .. size).step_by(p) {
+            nums[i] = false;
+        }
+    }
+    let mut res = Vec::new();
+    for i in 2..size {
+        if nums[i] { res.push(i as u32); }
+    }
+    return res;
+}
+
+fn rt(n: u32) -> u32 {
+    let s = n.to_string();
+    let mut chars = s.chars();
+    let f = chars.next().unwrap();
+    //chars.next_back();
+    let mut res = String::from(chars.as_str());
+    res.push(f);
+    res.parse::<u32>().unwrap()
+}
+
+fn rp(n: u32, is: u32, k: u8) -> u32 {
+    let s = n.to_string();
+    let mut hs = HashSet::new();
+    let mut iss = is;
+    while iss > 0 {
+        hs.insert(iss%10);
+        iss/=10;
+    }
+
+    let mut ress = 0;
+    let mut index = 0;
+    for c in s.chars() {
+        ress*=10;
+        if !hs.contains(&(index+1)) {
+            let cc = c.to_string().parse::<u32>().unwrap();
+            //println!("--{} {} {} {}", cc, c, index+1, s);
+            ress += cc;
+        } else {
+            ress += k as u32;
+        }
+        index+=1;
+    }
+    return ress;
+}
+
+fn replacements(n: u32, is:u32, ps: &HashSet<u32>) -> usize {
+    //let mut res = Vec::new();
+    //println!("-------");
+    let mut res = 0;
+    let mut found = false;
+    for i in 0..=9 {
+        let r=rp(n, is, i);
+        if r.to_string().len() < n.to_string().len() { continue; }
+        if r == n { found = true; }
+        //println!("{} {} {} {}", r, n, is, i);
+        if ps.contains(&r) {
+            //println!(":: {} {} {} {}", r, n,is,i);
+            //res.push(r);
+            res+=1;
+        }
+    }
+    if !found { return 0; }
+    return res;
+}
+
+fn rm(n: u32, _: &Vec<u32>, ps: &HashSet<u32>) -> usize {
+    let len = n.to_string().len();
+    let rms = lpp(len as u8);
+    let mut max_rpls = 0;
+    //println!("len {}", rms.len());
+    for r in rms.iter() {
+        if r.to_string().len() > len {
+            break;
+        }
+        //if !is_diff_tn(*r, len as u32) {
+        //    continue;
+        //}
+        let rpsss = replacements(n, *r, ps);
+        //println!("{} {} {}", rpsss, n, *r);
+        if rpsss > max_rpls {
+            max_rpls = rpsss;
+            //println!("-------- {}", *r);
+            //for r in rpsss.iter() {
+            //    println!("{}", r);
+            //}
+        }
+    }
+    return max_rpls;
+}
+
+fn b_t_is(n: u32) -> u32 {
+    let mut rr = n;
+    let mut index = 1;
+    let mut res = 0;
+    while rr > 0 {
+        let c = rr % 2;
+        if c == 1 {
+            res*=10;
+            res+=index;
+        }
+        index+=1;
+        rr/=2;
+    }
+    return res;
+}
+
+fn lpp(n: u8) -> Vec<u32> {
+    let mut res = Vec::new();
+    let bt = 0;
+    let mut tn = 1;
+    for _ in 0..n {
+        tn *= 2;
+    }
+    for i in 1..tn {
+        res.push(b_t_is(i));
+    }
+
+    return res;
+}
+
+
+fn main() {
+    //let r = b_t_is(5);
+    //println!("{}", r);
+    //return;
+    //let pmsss = lpp(4);
+    //for p in pmsss.iter() {
+      //  println!("{}", p);
+    //}
+    //return;
+    let ps = er();
+    let mut hs = HashSet::new();
+    for p in ps.iter() {
+        hs.insert(*p);
+    }
+    //let r = rp(56003, 13, 1);
+    //let id = is_diff(763);
+    //println!("...");
+    let rms = lpp(6);
+    //for r in rs.iter() {
+    //    println!("{}", r);
+    //}
+    //
+    //println!(".x.");
+    //let v8res = rm(120383, &rms, &hs); // 100109,
+    //for p in v8res.iter() {
+    //    println!("{}", v8res);
+    //}
+    //return;
+    
+    for p in ps.iter() {
+        let l = rm(*p, &rms, &hs);
+        //println!("{}", p);
+        if l == 8 {
+            //if *p == 56003 {
+            println!("{}", p);
+            //}
+            break;
+        }
+    }
+    //println!("{}", bs);
+    //for r in rsss {
+    //    println!("{}", r);
+    //}
+}
+