32 lines
640 B
Rust
32 lines
640 B
Rust
use std::io::{read_to_string, stdin};
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fn main() {
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let temp = read_to_string(stdin()).unwrap();
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let mut iter = temp
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.split_ascii_whitespace()
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.map(|x| x.parse::<usize>().unwrap());
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let n = iter.next().unwrap();
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let mut cups = vec![false; 3];
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cups[0] = true;
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(0..n).for_each(|_| {
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let (x, y) = (iter.next().unwrap() - 1, iter.next().unwrap() - 1);
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let temp = cups[y];
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cups[y] = cups[x];
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cups[x] = temp;
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});
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println!(
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"{}",
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if cups[0] {
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1
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} else if cups[1] {
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2
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} else {
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3
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}
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)
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}
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