fn main() {
    input! {
        p: u64,
        m: u64,
    }
    let mut a = vec![];
    let mut m = m;
    while m > 0 {
        a.push(m % 10);
        m /= 10;
    }
    if a.is_empty() {
        a.push(0);
    }
    let ans = radix_conversion(&a, 10, p);
    use util::*;
    println!("{}", ans.iter().rev().join(""));
}

// ---------- begin radix conversion(naive) ----------
fn radix_conversion(a: &[u64], p: u64, q: u64) -> Vec<u64> {
    assert!(p > 1 && q > 1);
    let mut b = vec![];
    for a in a.iter().rev() {
        let mut carry = *a;
        for b in b.iter_mut() {
            let v = *b * p + carry;
            *b = v % q;
            carry = v / q;
        }
        while carry > 0 {
            b.push(carry % q);
            carry /= q;
        }
    }
    if b.is_empty() {
        b.push(0);
    }
    b
}
// ---------- end radix conversion(naive) ----------


// ---------- 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 ----------
mod util {
    pub trait Join {
        fn join(self, sep: &str) -> String;
    }

    impl<T, I> Join for I
    where
        I: Iterator<Item = T>,
        T: std::fmt::Display,
    {
        fn join(self, sep: &str) -> String {
            let mut s = String::new();
            use std::fmt::*;
            for (i, v) in self.enumerate() {
                if i > 0 {
                    write!(&mut s, "{}", sep).ok();
                }
                write!(&mut s, "{}", v).ok();
            }
            s
        }
    }
}