27 lines
747 B
Rust
27 lines
747 B
Rust
use std::collections::{HashMap, HashSet};
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impl Solution {
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pub fn is_isomorphic(s: String, t: String) -> bool {
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let mut projection: HashMap<char, char> = HashMap::new();
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let mut used: HashSet<char> = HashSet::new();
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for (l, r) in s.chars().zip(t.chars()) {
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match projection.get(&l) {
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Some(&expected_r) if expected_r != r => {
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return false;
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}
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None => {
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if used.contains(&r) {
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return false;
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}
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projection.insert(l, r);
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used.insert(r);
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}
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_ => { /* no-op */ }
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}
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}
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true
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}
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}
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