20 lines
505 B
Rust
20 lines
505 B
Rust
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struct Solution;
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impl Solution {
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pub fn longest_valid_parentheses(s: String) -> i32 {
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let mut st = vec![];
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let s = s.into_bytes();
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let mut res = 0;
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for (i, &x) in s.iter().enumerate() {
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if x == 41 && matches!(st.last(), Some(j) if s[j - 1] == 40) {
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st.pop();
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res = res.max(i + 1 - st.last().unwrap_or(&0));
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} else {
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st.push(i + 1);
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}
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}
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res as i32
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}
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}
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fn main() {}
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