diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/RustIsBestLang.iml b/.idea/RustIsBestLang.iml
new file mode 100644
index 0000000..cf84ae4
--- /dev/null
+++ b/.idea/RustIsBestLang.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="EMPTY_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..5cc5c53
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/RustIsBestLang.iml" filepath="$PROJECT_DIR$/.idea/RustIsBestLang.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..5b2750d
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "RustIsBestLang"
+version = "0.1.0"
diff --git a/src/bin/cf-1886c.rs b/src/bin/cf-1886c.rs
new file mode 100644
index 0000000..4cacf40
--- /dev/null
+++ b/src/bin/cf-1886c.rs
@@ -0,0 +1,81 @@
+use std::io::stdin;
+use std::collections::VecDeque;
+
+fn calc_sum(n:i32,k:i32) -> i64 {
+    n as i64 * k as i64 - (k as i64 - 1)* k as i64 / 2
+}
+
+fn lower_bound(n:i32,x:i64) -> (i32,i64) {
+    let mut l = 0;
+    let mut r = n;
+    while l != r {
+        let mid = l + r + 1 >> 1;
+        if calc_sum(n,mid) >= x {
+            r = mid - 1;
+        } else {
+            l = mid;
+        }
+    }
+    (l, x-calc_sum(n,l))
+}
+
+fn solve() {
+    let mut buf = String::new();
+    stdin().read_line(&mut buf).ok();
+    let at = buf.to_owned();
+    let a = at.trim().as_bytes();
+    let n = a.len();
+    let mut ena = vec![true;n];
+    let mut cnt = 0;
+    let mut st:VecDeque<usize> = VecDeque::new();
+    buf.clear();
+    stdin().read_line(&mut buf).ok();
+    let pos:i64 = buf.trim().parse().unwrap();
+    let (prev, diff) = lower_bound(n as i32,pos);
+    // println!("{prev} {diff}");
+    for (i,&c) in a.iter().enumerate() {
+        if cnt == prev{
+            break;
+        }
+        while let Some(&j) = st.back() {
+            if a[j] <= c {
+                break;
+            }
+            cnt += 1;
+            ena[j] = false;
+            if cnt == prev {
+                break;
+            }
+            st.pop_back();
+        }
+        st.push_back(i);
+    }
+        for i in (0..n).rev() {
+            if cnt == prev {
+                break;
+            }
+            if ena[i] {
+                ena[i] = false;
+                cnt+=1;
+            }
+        }
+    let mut p = 0;
+    for (i,&c) in a.iter().enumerate() {
+        if ena[i] {
+            p += 1;
+            if p == diff {
+                print!("{}",c as char);
+                return;
+            }
+        }
+    }
+}
+
+fn main() {
+    let mut buf = String::new();
+    stdin().read_line(&mut buf).ok();
+    let t:i32 = buf.trim().parse().unwrap();
+    for _ in 0..t {
+        solve();
+    }
+}
\ No newline at end of file
diff --git a/src/bin/cf-620c.rs b/src/bin/cf-620c.rs
new file mode 100644
index 0000000..94c5eca
--- /dev/null
+++ b/src/bin/cf-620c.rs
@@ -0,0 +1,31 @@
+fn main() {
+    use std::io::stdin;
+    use std::collections::HashSet;
+    let mut buf:String = String::new();
+    stdin().read_line(&mut buf).ok();
+    let n:usize = buf.trim().parse().unwrap();
+    buf.clear();
+    let mut a:Vec<i32> = Vec::with_capacity(n);
+    stdin().read_line(&mut buf).ok();
+    buf.trim().split(' ').for_each(|val| a.push(val.parse().unwrap()));
+    let mut mp:HashSet<i32> = HashSet::new();
+    let mut res = vec![];
+    let mut l = 0usize;
+    for i in 0..n {
+        if mp.contains(&a[i]) {
+            res.push([l,i]);
+            l = i + 1;
+            mp.clear();
+        } else {
+            mp.insert(a[i]);
+        }
+    }
+    if res.is_empty() {
+        println!("-1");
+    } else {
+        let m = res.len();
+        println!("{}",res.len());
+        res[m-1] = [res[m-1][0],n-1];
+        res.into_iter().for_each(|[l,r]| println!("{} {}",l+1,r+1));
+    }
+}
\ No newline at end of file
diff --git a/src/bin/lc-15.rs b/src/bin/lc-15.rs
new file mode 100644
index 0000000..754ec82
--- /dev/null
+++ b/src/bin/lc-15.rs
@@ -0,0 +1,43 @@
+struct Solution;
+
+impl Solution {
+    pub fn three_sum(nums: Vec<i32>) -> Vec<Vec<i32>> {
+        let mut a = nums.to_owned();
+        a.sort();
+        let n = a.len();
+        let mut res:Vec<Vec<i32>> = vec![];
+        for i in 0..n-2 {
+            if i>0 && a[i]==a[i-1] { continue; }
+            let mut l = i + 1;
+            let mut r = n - 1;
+            while l < r {
+                if a[l] + a[r] == -a[i] {
+                    res.push(vec![a[i],a[l],a[r]]);
+                }
+                if a[l] + a[r] < -a[i] {
+                    while l < r {
+                        l += 1;
+                        if a[l] != a[l-1] { break; }
+                    }
+                } else {
+                    while l < r {
+                        r -= 1;
+                        if a[r] != a[r+1] { break; }
+                    }
+                }
+            }
+        }
+        res
+    }
+}
+
+fn main() {
+    let nums = vec![-1,0,1,2,-1,-4];
+    let res = Solution::three_sum(nums);
+    for x in res {
+        for y in x {
+            println!("{y} ");
+        }
+        println!();
+    }
+}
\ No newline at end of file
diff --git a/src/bin/lc-179.rs b/src/bin/lc-179.rs
new file mode 100644
index 0000000..81e1923
--- /dev/null
+++ b/src/bin/lc-179.rs
@@ -0,0 +1,35 @@
+struct Solution;
+
+impl Solution {
+    pub fn largest_number(nums: Vec<i32>) -> String {
+        use std::cmp::{Ordering, max};
+        let n = nums.len();
+        let mut a = Vec::with_capacity(n);
+        for x in nums {
+            a.push(x.to_string().into_bytes());
+        }
+        a.sort_by(|s,t| {
+            let sl = s.len();
+            let tl = t.len();
+            let L = max(sl,tl);
+            for i in 0..L {
+                let i = L % sl;
+                let j = L % tl;
+                if s[i]!=t[j] {
+                    return t[j].cmp(&s[i]);
+                }
+            }
+            Ordering::Equal
+        });
+        let mut s = String::new();
+        for x in a {
+            s.push_str(String::from_utf8(x).unwrap().as_str());
+        }
+        s
+    }
+}
+
+fn main() {
+    let nums = vec![10,2];
+    println!("{}",Solution::largest_number(nums));
+}
\ No newline at end of file
diff --git a/src/bin/lc-22.rs b/src/bin/lc-22.rs
new file mode 100644
index 0000000..9972a28
--- /dev/null
+++ b/src/bin/lc-22.rs
@@ -0,0 +1,53 @@
+use std::collections::VecDeque;
+
+struct Solution;
+
+struct St {
+    n:i32,
+    stack:VecDeque<i32>,
+    res:Vec<String>
+}
+
+impl St {
+    fn solve(&mut self, i: i32, open: i32, close: i32){
+        if i == 2 * self.n {
+            let mut s = String::with_capacity(self.n as usize);
+            for x in &self.stack {
+                match x {
+                    1 => s.push('('),
+                    0 => s.push(')'),
+                    _ => ()
+                }
+            }
+            self.res.push(s);
+            return;
+        }
+        if open < self.n {
+            self.stack.push_back(1);
+            self.solve(i+1,open+1,close);
+            self.stack.pop_back();
+        }
+        if close < open {
+            self.stack.push_back(0);
+            self.solve(i+1,open,close+1);
+            self.stack.pop_back();
+        }
+
+    }
+}
+
+impl Solution {
+    pub fn generate_parenthesis(n: i32) -> Vec<String> {
+        let mut st = St{n, stack: Default::default(), res: vec![] };
+        st.solve(0,0,0);
+        st.res
+    }
+}
+
+fn main() {
+    let n = 3;
+    let res = Solution::generate_parenthesis(n);
+    for s in &res {
+        println!("{s}");
+    }
+}
\ No newline at end of file
diff --git a/src/bin/lc-2448.rs b/src/bin/lc-2448.rs
new file mode 100644
index 0000000..55c5590
--- /dev/null
+++ b/src/bin/lc-2448.rs
@@ -0,0 +1,33 @@
+struct Solution;
+
+impl Solution {
+    pub fn min_cost(nums: Vec<i32>, cost: Vec<i32>) -> i64 {
+        let n = nums.len();
+        let mut idx = (0..n).collect::<Vec<usize>>();
+        idx.sort_by(|&i,&j| nums[i].cmp(&nums[j]));
+        let mut l = 0;
+        let mut r = 0;
+        cost.iter().for_each(|&x|r+=x as i64);
+        let mut min_diff = (r - l).abs();
+        let mut med = 0;
+        for (t,&i) in idx.iter().enumerate() {
+            r -= cost[i] as i64;
+            l += cost[i] as i64;
+            if (r - l).abs() < min_diff {
+                min_diff = (r-l).abs();
+                med = if r > l { nums[idx[t + 1]] } else { nums[i] };
+            }
+        }
+        let mut res = 0;
+        for i in 0..n {
+            res += (nums[idx[i]] - med).abs() as i64 * cost[idx[i]] as i64;
+        }
+        res
+    }
+}
+
+fn main() {
+    let nums = vec![1,3,5,2];
+    let cost = vec![2,3,1,14];
+    println!("{}",Solution::min_cost(nums,cost));
+}
\ No newline at end of file
diff --git a/src/bin/lc-2454.rs b/src/bin/lc-2454.rs
new file mode 100644
index 0000000..a3d0861
--- /dev/null
+++ b/src/bin/lc-2454.rs
@@ -0,0 +1,9 @@
+struct Solution {}
+
+impl Solution {
+    pub fn second_greater_element(nums: Vec<i32>) -> Vec<i32> {
+        let n = nums.len();
+    }
+}
+
+fn main() {}
\ No newline at end of file
diff --git a/src/bin/lc-2589.rs b/src/bin/lc-2589.rs
new file mode 100644
index 0000000..620bc73
--- /dev/null
+++ b/src/bin/lc-2589.rs
@@ -0,0 +1,39 @@
+struct Solution;
+
+impl Solution {
+    pub fn find_minimum_time(tasks: Vec<Vec<i32>>) -> i32 {
+        use std::collections::BinaryHeap;
+        use std::cmp::{min, max};
+        let mut tasks = tasks.to_owned();
+        tasks.sort();
+        let mut cnt = 0;
+        let mut res = 0;
+        let mut pq:BinaryHeap<(i32,i32)> = BinaryHeap::new();
+        for it in &tasks {
+            let s = it[0];
+            let e = it[1];
+            let req = it[2];
+            while let Some(&(pe,pc)) = pq.peek() {
+                if -pe >= s {
+                    pq.pop();
+                    let new_pc = min(pc, - pe - s + 1);
+                    pq.push((pe, new_pc));
+                    cnt -= pc - new_pc;
+                    break;
+                }
+                pq.pop();
+                cnt -= pc;
+            }
+            let c = max(req - cnt, 0);
+            cnt += c;
+            res += c;
+            pq.push((-e,c));
+        }
+        res
+    }
+}
+
+fn main() {
+    let tasks = vec![vec![2,3,1],vec![4,5,1],vec![1,5,2]];
+    println!("{}",Solution::find_minimum_time(tasks));
+}
\ No newline at end of file
diff --git a/src/bin/lc-2697.rs b/src/bin/lc-2697.rs
new file mode 100644
index 0000000..9a862ca
--- /dev/null
+++ b/src/bin/lc-2697.rs
@@ -0,0 +1,22 @@
+struct Solution {}
+
+impl Solution {
+    pub fn make_smallest_palindrome(s: String) -> String {
+        let n = s.len();
+        let r = n >> 1;
+        let mut ss = s.into_bytes();
+        for i in 0..r {
+            if ss[i] > ss[n - 1 - i] {
+                ss[i] = ss[n-1-i];
+            } else {
+                ss[n-1-i] = ss[i];
+            }
+        }
+        String::from_utf8(ss).unwrap()
+    }
+}
+
+fn main() {
+    let s = "atie".to_string();
+    println!("{}",Solution::make_smallest_palindrome(s));
+}
\ No newline at end of file
diff --git a/src/bin/lc-2828.rs b/src/bin/lc-2828.rs
new file mode 100644
index 0000000..e8d8d6a
--- /dev/null
+++ b/src/bin/lc-2828.rs
@@ -0,0 +1,19 @@
+struct Solution;
+
+impl Solution {
+    pub fn is_acronym(words: Vec<String>, s: String) -> bool {
+        let n = words.len();
+        let mut s = s.as_bytes();
+        if s.len()!=n {return false;}
+        for i in 0..n {
+            if words[i].as_bytes()[0] != s[i] {
+                return false;
+            }
+        }
+        true
+    }
+}
+
+fn main() {
+
+}
\ No newline at end of file
diff --git a/src/bin/lc-321.rs b/src/bin/lc-321.rs
new file mode 100644
index 0000000..b479803
--- /dev/null
+++ b/src/bin/lc-321.rs
@@ -0,0 +1,80 @@
+use std::collections::VecDeque;
+
+struct Solution;
+
+impl Solution {
+    pub fn max_number(a: Vec<i32>, b: Vec<i32>, k: i32) -> Vec<i32> {
+        let k = k as usize;
+        let mut i = 0; let n = a.len();
+        let mut j = 0; let m = b.len();
+        let mut st1 = Vec::new();
+        let mut st2 = Vec::new();
+        let mut cnt = 0;
+        while i<n || j<m {
+            if j==m || i<n && (a[i]>b[j] || j+1==m || i+1!=n && a[i+1]>b[j+1]) {
+                while let Some(t) = st1.last() {
+                    if cnt-1+n+m-i-j<k || &a[i]<=t {break;}
+                    cnt -= 1;
+                    st1.pop();
+                }
+                cnt+=1;
+                st1.push(a[i]);
+                i+=1;
+            } else {
+                while let Some(t) = st2.last() {
+                    if cnt-1+n+m-i-j<k || &b[j]<=t {break;}
+                    cnt -= 1;
+                    st2.pop();
+                }
+                cnt+=1;
+                st2.push(b[j]);
+                j+=1;
+            }
+        }
+        let mut res = Vec::with_capacity(k);
+        i = 0;
+        j = 0;
+        while res.len()<k {
+            if j == st2.len() {
+                res.push(st1[i]);
+                i += 1;
+            } else if i == st1.len() {
+                res.push(st2[j]);
+                j += 1;
+            } else {
+                if st1[i] > st2[j] {
+                    res.push(st1[i]);
+                    i += 1;
+                } else if st1[i] < st2[j] {
+                    res.push(st2[j]);
+                    j += 1;
+                } else {
+                    if i + 1 == st1.len() {
+                        res.push(st2[j]);
+                        j += 1;
+                    } else if j + 1 == st2.len() {
+                        res.push(st1[i]);
+                        i += 1;
+                    } else if st1[i+1]>st2[j+1] {
+                        res.push(st1[i]);
+                        i += 1;
+                    } else {
+                        res.push(st2[j]);
+                        j += 1;
+                    }
+                }
+            }
+        }
+        res
+    }
+}
+
+fn main() {
+    let nums1 = vec![3,9];
+    let nums2 = vec![8,9];
+    let k = 3;
+    let res = Solution::max_number(nums1,nums2, k);
+    for x in res {
+        print!("{x} ");
+    }
+}
\ No newline at end of file
diff --git a/src/bin/lc-376.rs b/src/bin/lc-376.rs
new file mode 100644
index 0000000..5c12443
--- /dev/null
+++ b/src/bin/lc-376.rs
@@ -0,0 +1,41 @@
+struct Solution;
+
+impl Solution {
+    pub fn wiggle_max_length(nums: Vec<i32>) -> i32 {
+        use std::collections::VecDeque;
+        type pii = (i32,i32);
+        let mut up:VecDeque<pii>   = VecDeque::new();
+        let mut down:VecDeque<pii> = VecDeque::new();
+        let mut up_max = 0;
+        let mut down_max = 0;
+        for x in nums {
+            while let Some(&(y,_)) = up.back() {
+                if y < x { break; }
+                up.pop_back();
+            }
+            while let Some(&(y,_)) = down.back() {
+                if y > x { break; }
+                down.pop_back();
+            }
+            let mut u = 1;
+            let mut d = 1;
+            if let Some(&(_,l)) = up.back() {
+                u = u.max(l+1);
+            }
+            if let Some(&(_,l)) = down.back() {
+                d = d.max(l+1);
+            }
+            up_max = up_max.max(u);
+            down_max = down_max.max(d);
+            down.push_back((x,u));
+            up.push_back((x,d));
+        }
+        up_max.max(down_max)
+    }
+}
+
+fn main() {
+    let nums = vec![1,7,4,9,2,5];
+    let b = nums[1..2].iter().collect::<Vec<&i32>>();
+    println!("{}",Solution::wiggle_max_length(nums));
+}
\ No newline at end of file
diff --git a/src/bin/lc-5.rs b/src/bin/lc-5.rs
new file mode 100644
index 0000000..32f2058
--- /dev/null
+++ b/src/bin/lc-5.rs
@@ -0,0 +1,36 @@
+struct Solution;
+
+impl Solution {
+    pub fn longest_palindrome(s: String) -> String {
+        use std::cmp::max;
+        let n = s.len();
+        let mut res = (0,0);
+        let mut mx = 0;
+        let mut dp=vec![vec![false;n];n];
+        let ss = s.into_bytes();
+        for i in (0..n).rev() {
+            for j in i..n {
+                let &c = &ss[i];
+                let &d = &ss[j];
+                if j == i {
+                    dp[i][j] = true;
+                } else if j == i + 1 {
+                    dp[i][j] = c==d;
+                } else {
+                    dp[i][j] = dp[i+1][j-1] && c==d;
+                }
+                if dp[i][j] && (j-i+1 > mx) {
+                    mx = max(mx,j-i+1);
+                    res = (i,j);
+                }
+            }
+        }
+        let (i,j) = res;
+        String::from_utf8(ss[i..=j].to_owned()).unwrap()
+    }
+}
+
+fn main() {
+    let s = String::from("babad");
+    println!("{}",Solution::longest_palindrome(s));
+}
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..41cd7a3 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,15 @@
-fn main() {
-    println!("Hello, world!");
+trait Printable<T> {
+    fn print(a:T);
+}
+
+struct Test;
+
+impl<T> Printable<T> for Test where T: std::fmt::Display {
+    fn print(a:T) {
+        println!("{a}");
+    }
+}
+
+fn main() {
+    <Test>::print(1.5);
 }