diff --git a/src/problem/mod.rs b/src/problem/mod.rs
index 12f903c..0f88d31 100644
--- a/src/problem/mod.rs
+++ b/src/problem/mod.rs
@@ -554,3 +554,5 @@ mod p2612_minimum_reverse_operations;
 mod p2680_maximum_or;
 
 mod p2643_row_with_maximum_ones;
+
+mod p2116_check_if_a_parentheses_string_can_be_valid;
diff --git a/src/problem/p2116_check_if_a_parentheses_string_can_be_valid.rs b/src/problem/p2116_check_if_a_parentheses_string_can_be_valid.rs
new file mode 100644
index 0000000..69529a7
--- /dev/null
+++ b/src/problem/p2116_check_if_a_parentheses_string_can_be_valid.rs
@@ -0,0 +1,80 @@
+/**
+ * [2116] Check if a Parentheses String Can Be Valid
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn can_be_valid(s: String, locked: String) -> bool {
+        let s: Vec<u8> = s.bytes().collect();
+        let locked: Vec<bool> = locked
+            .bytes()
+            .map(|x| if x == b'0' { false } else { true })
+            .collect();
+
+        if s.len() % 2 != 0 {
+            return false;
+        }
+
+        let mut locked_left = vec![];
+        let mut unlocked_pos = vec![];
+
+        for (i, &v) in s.iter().enumerate() {
+            if !locked[i] {
+                unlocked_pos.push(i);
+            } else {
+                if v == b'(' {
+                    locked_left.push(i);
+                } else {
+                    // 首先使用锁定的左括号匹配
+                    if locked_left.pop().is_none() {
+                        // 然后使用未锁定的位置修改
+                        if unlocked_pos.pop().is_none() {
+                            return false;
+                        }
+                    }
+                }
+            }
+        }
+
+        // 判断剩余的未锁定位置和锁定的左括号是否匹配
+        while let Some(left_pos) = locked_left.pop() {
+            if let Some(unlock_pos) = unlocked_pos.pop() {
+                if left_pos > unlock_pos {
+                    return false;
+                }
+            } else {
+                return false;
+            }
+        }
+
+        // 剩余的未锁定括号必须是偶数个
+        unlocked_pos.len() % 2 == 0
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_2116() {
+        assert!(!Solution::can_be_valid(
+            "(((())".to_owned(),
+            "111111".to_owned()
+        ));
+        assert!(Solution::can_be_valid(
+            "))()))".to_owned(),
+            "010100".to_owned()
+        ));
+        assert!(Solution::can_be_valid("()()".to_owned(), "0000".to_owned()));
+        assert!(!Solution::can_be_valid(")".to_owned(), "0".to_owned()));
+        assert!(Solution::can_be_valid(
+            "(((())(((())".to_owned(),
+            "111111010111".to_owned()
+        ));
+    }
+}