44. Wildcard Matching

Given an input string (`s`) and a pattern (`p`), implement wildcard pattern matching with support for `'?'` and `'*'` where:

• `'?'` Matches any single character.
• `'*'` Matches any sequence of characters (including the empty sequence).

The matching should cover the entire input string (not partial).

Example 1:

```Input: s = "aa", p = "a"
Output: false
Explanation: "a" does not match the entire string "aa".
```

Example 2:

```Input: s = "aa", p = "*"
Output: true
Explanation: '*' matches any sequence.
```

Example 3:

```Input: s = "cb", p = "?a"
Output: false
Explanation: '?' matches 'c', but the second letter is 'a', which does not match 'b'.
```

Example 4:

```Input: s = "adceb", p = "*a*b"
Output: true
Explanation: The first '*' matches the empty sequence, while the second '*' matches the substring "dce".
```

Example 5:

```Input: s = "acdcb", p = "a*c?b"
Output: false
```

Constraints:

• `0 <= s.length, p.length <= 2000`
• `s` contains only lowercase English letters.
• `p` contains only lowercase English letters, `'?'` or `'*'`.

44. Wildcard Matching
``````struct Solution;

impl Solution {
fn is_match(s: String, p: String) -> bool {
let n = s.len();
let m = p.len();
let s: Vec<char> = s.chars().collect();
let p: Vec<char> = p.chars().collect();
let mut memo: Vec<Vec<Option<bool>>> = vec![vec![None; m + 1]; n + 1];
Self::is_match_dp(n, m, &mut memo, &s, &p)
}

fn is_match_dp(
n: usize,
m: usize,
memo: &mut Vec<Vec<Option<bool>>>,
s: &[char],
p: &[char],
) -> bool {
if let Some(ans) = memo[n][m] {
ans
} else {
let res = if n == 0 && m == 0 {
true
} else if n == 0 && m != 0 {
if p[m - 1] == '*' {
Self::is_match_dp(n, m - 1, memo, s, p)
} else {
false
}
} else if n != 0 && m == 0 {
false
} else {
if s[n - 1] == p[m - 1] {
Self::is_match_dp(n - 1, m - 1, memo, s, p)
} else {
match p[m - 1] {
'?' => Self::is_match_dp(n - 1, m - 1, memo, s, p),
'*' => {
Self::is_match_dp(n - 1, m, memo, s, p)
|| Self::is_match_dp(n, m - 1, memo, s, p)
}
_ => false,
}
}
};

memo[n][m] = Some(res);
res
}
}
}

#[test]
fn test() {
let s = "aa".to_string();
let p = "a".to_string();
let res = false;
assert_eq!(Solution::is_match(s, p), res);
let s = "aa".to_string();
let p = "*".to_string();
let res = true;
assert_eq!(Solution::is_match(s, p), res);
let s = "cb".to_string();
let p = "?a".to_string();
let res = false;
assert_eq!(Solution::is_match(s, p), res);