use std::io::Write;
use std::collections::*;

type Map<K, V> = BTreeMap<K, V>;
type Set<T> = BTreeSet<T>;
type Deque<T> = VecDeque<T>;

fn run() {
    input! {
        t: usize,
        ask: [(usize1, usize); t],
    }
    let mut s = vec![b'1'];
    let mut memo = vec![s.clone()];
    for n in 1.. {
        let z = run_length_encoding(s);
        let mut out = String::new();
        for (c, len) in z {
            use std::fmt::*;
            write!(&mut out, "{:b}", len).ok();
            write!(&mut out, "{}", c as char).ok();
        }
        s = out.bytes().collect();
        let p = out.chars().rev().collect::<String>();
        memo.push(s.iter().cloned().rev().collect());
        if s.len() >= 4000000 {
            break;
        }
    }
    let out = std::io::stdout();
    let mut out = std::io::BufWriter::new(out.lock());
    for (mut n, mut m) in ask {
        if n >= memo.len() {
            n = n % 2 + memo.len() / 2 * 2;
            while n >= memo.len() {
                n -= 2;
            }
        }
        let ans = memo[n].get(m).map_or('0', |c| *c as char);
        writeln!(out, "{}", ans).ok();
    }
}

fn main() {
    run();
    /*
    let mut s = vec![b'1'];
    let mut memo = vec![s.clone()];
    for n in 1..=10 {
        let z = run_length_encoding(s);
        let mut out = String::new();
        for (c, len) in z {
            use std::fmt::*;
            write!(&mut out, "{:b}", len).ok();
            write!(&mut out, "{}", c as char).ok();
        }
        s = out.bytes().collect();
        memo.push(s.iter().cloned().rev().collect());
        if s.len() >= 100000000 {
            break;
        }
    }
    for (i, s) in memo.windows(3).enumerate() {
        let x = s[0].iter().zip(s[2].iter()).all(|c| *c.0 == *c.1);
        if !x {
            println!("ERROR: {}", i);
        }
    }
    */
}

// ---------- begin input macro ----------
// reference: https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
#[macro_export]
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

#[macro_export]
macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};
    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

#[macro_export]
macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };
    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };
    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };
    ($iter:expr, bytes) => {
        read_value!($iter, String).bytes().collect::<Vec<u8>>()
    };
    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };
    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}
// ---------- end input macro ----------
// ---------- begin Run Length Encoding ----------
fn run_length_encoding<T: Eq>(a: Vec<T>) -> Vec<(T, usize)> {
    let mut a = a.into_iter().map(|a| (a, 1)).collect::<Vec<_>>();
    a.dedup_by(|a, b| {
        a.0 == b.0 && {
            b.1 += a.1;
            true
        }
    });
    a
}
// ---------- end Run Length Encoding ----------