3 files changed, 123 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
index ea8c4bf..2a0038a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /target
+.idea
+\ No newline at end of file
diff --git a/src/bin/p0002.rs b/src/bin/p0002.rs
new file mode 100644
index 0000000..ac028a2
--- /dev/null
+++ b/src/bin/p0002.rs
@@ -0,0 +1,88 @@
+#[derive(PartialEq, Eq, Clone, Debug)]
+pub struct ListNode {
+  pub val: i32,
+  pub next: Option<Box<ListNode>>
+}
+
+impl ListNode {
+  #[inline]
+  fn new(val: i32) -> Self {
+    ListNode {
+      next: None,
+      val
+    }
+  }
+}
+
+struct Solution {}
+
+impl Solution {
+    pub fn add_two_numbers(l1: Option<Box<ListNode>>, l2: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
+        let mut result: Option<Box<ListNode>> = None;
+        let mut cur1 = &l1;
+        let mut cur2 = &l2;
+        let mut carry: i32 = 0;
+        {
+            let mut cur_res = &mut result;
+            loop {
+                if *cur1 == None && *cur2 == None && carry == 0 {
+                    break;
+                } else {
+                    let n1 = match cur1 {
+                        Some(node) => {
+                            cur1 = &cur1.as_ref().unwrap().next;
+                            node.val
+                        },
+                        None => 0
+                    };
+                    let n2 = match cur2 {
+                        Some(node) => {
+                            cur2 = &cur2.as_ref().unwrap().next;
+                            node.val
+                        },
+                        None => 0
+                    };
+                    let n = (n1 + n2 + carry) % 10;
+                    carry = if (n1 + n2 + carry) >= 10 { 1 } else { 0 };
+                    *cur_res = Some(Box::new(ListNode::new(n)));
+                    cur_res = &mut cur_res.as_mut().unwrap().next;
+                    continue;
+                }
+            }
+        }
+        result
+    }
+}
+
+fn vector2list(vec: Vec<i32>) -> Option<Box<ListNode>> {
+    let mut result: Option<Box<ListNode>> = None;
+    for i in 0..vec.len() {
+        let mut new_result = Some(Box::new(ListNode::new(vec[vec.len() - i - 1])));
+        new_result.as_mut().unwrap().next = result;
+        result = new_result;
+    }
+    result
+}
+
+fn list2vector(lst: Option<Box<ListNode>>) -> Vec<i32> {
+    let mut result: Vec<i32> = Vec::new();
+    let mut cur = &lst;
+    loop {
+        match cur {
+            None => break,
+            Some(node) => {
+                result.push(node.val);
+                cur = &node.next;
+            },
+        }
+    }
+    result
+}
+
+fn test(l1: Vec<i32>, l2: Vec<i32>) -> Vec<i32> {
+    list2vector(Solution::add_two_numbers(vector2list(l1), vector2list(l2)))
+}
+
+fn main() {
+    println!("{:?}", test(vec![1,2,3], vec![4,5,6]));
+}
diff --git a/src/bin/p0003.rs b/src/bin/p0003.rs
new file mode 100644
index 0000000..7293c13
--- /dev/null
+++ b/src/bin/p0003.rs
@@ -0,0 +1,34 @@
+struct Solution {}
+
+impl Solution {
+    pub fn length_of_longest_substring(s: String) -> i32 {
+        let mut set: [u8;256] = [0;256];
+        let mut i1: usize = 0;
+        let mut i2: usize = 0;
+        let mut max: i32 = 0;
+        loop {
+            if i1 >= s.len() { break; }
+            if set[s.as_bytes()[i1] as usize] == 0 {
+                set[s.as_bytes()[i1] as usize] = 1;
+                i1 = i1 + 1;
+                if i1 as i32 - i2 as i32 > max { max = i1 as i32 - i2 as i32 }
+                continue;
+            } else {
+                loop {
+                    set[s.as_bytes()[i2]  as usize] = 0;
+                    i2 = i2 + 1;
+                    if set[s.as_bytes()[i1] as usize] == 0 {
+                        break;
+                    } else {
+                        continue;
+                    }
+                }
+            }
+        }
+        max
+    }
+}
+
+fn main() {
+    println!("{:?}", Solution::length_of_longest_substring("abcabcbb".to_string()));
+}
+\ No newline at end of file