Solved 0392

Author: guangsheng.li01

src/a0392_is_subsequence.rs

@@ -0,0 +1,67 @@
+/*
+ * [0392] is-subsequence
+ */
+
+pub struct Solution {}
+
+// solution impl starts here
+
+// 执行用时 : 4 ms , 在所有 Rust 提交中击败了 90.00% 的用户
+// 内存消耗 : 3.3 MB , 在所有 Rust 提交中击败了 80.00% 的用户
+// impl Solution {
+//     pub fn is_subsequence(s: String, t: String) -> bool {
+//         if s.len() == 0 {
+//             return true;
+//         }
+//         let mut i = 0;
+//         for c in t.chars() {
+//             if s[i..].chars().next().unwrap() == c {
+//                 i += 1;
+//             }
+//             if i == s.len() {
+//                 return true;
+//             }
+//         }
+//         false
+//     }
+// }
+
+// 执行用时 : 4 ms , 在所有 Rust 提交中击败了 90.00% 的用户
+// 内存消耗 : 3.1 MB , 在所有 Rust 提交中击败了 100.00% 的用户
+impl Solution {
+    pub fn is_subsequence(s: String, t: String) -> bool {
+        if s.len() == 0 {
+            return true;
+        }
+        let mut s_chars = s.chars();
+        let mut s_char = s_chars.next();
+        for c in t.chars() {
+            if s_char.unwrap() == c {
+                s_char = s_chars.next();
+            }
+            if s_char.is_none() {
+                return true;
+            }
+        }
+        false
+    }
+}
+
+// solution impl ends here
+
+// solution tests starts here
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_case0() {
+        assert_eq!(
+            Solution::is_subsequence("abc".to_owned(), "ahbgdc".to_owned()),
+            true
+        );
+    }
+}
+
+// solution tests ends here

src/lib.rs

@@ -20,6 +20,7 @@ mod a0118_pascals_triangle;
 mod a0119_pascals_triangle_ii;
 mod a0145_binary_tree_postorder_traversal;
 mod a0172_factorial_trailing_zeroes;
+mod a0392_is_subsequence;
 mod a0400_nth_digit;
 mod a0404_sum_of_left_leaves;
 mod a0405_convert_a_number_to_hexadecimal;