27 lines
603 B
Rust
27 lines
603 B
Rust
use std::collections::HashSet;
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impl Solution {
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pub fn is_path_crossing(path: String) -> bool {
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let mut visited = HashSet::from([(0, 0)]);
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let mut x = 0;
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let mut y = 0;
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for d in path.chars() {
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match d {
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'N' => y -= 1,
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'S' => y += 1,
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'E' => x += 1,
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'W' => x -= 1,
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_ => unreachable!("invalid direction"),
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}
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if visited.contains(&(x, y)) {
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return true;
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}
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visited.insert((x, y));
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}
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false
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}
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}
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