20 lines
379 B
Rust
20 lines
379 B
Rust
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struct Solution;
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impl Solution {
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pub fn is_valid(s: String) -> bool {
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let s = s.into_bytes();
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let mut st = vec![];
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for x in s {
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if matches!(st.last(), Some(y) if x - y == 2 || x - y == 1) {
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st.pop();
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} else {
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st.push(x);
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}
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}
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st.is_empty()
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}
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}
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fn main() {
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}
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