noname53

#include<bits/stdc++.h>


using namespace std;


typedef vector<long long> vi;


vi vec(int xx){
    vi a; a.clear();
    int x = xx, base = 1000;
    while (base > x) base /= 10;
    for (; base; base /= 10)
    {
        a.push_back(x/base);
        x %= base;
    }
    return a;
}

vi operator * (vi aa, vi b){
    vi a(aa.size() + b.size() - 1, 0);
    for (int i = 0; i < aa.size(); i++)
        for (int j = 0; j < b.size(); j++)
            a[i + j] += aa[i]*b[j];
    for (int i = a.size() - 1; i; i--)
        a[i - 1] += a[i]/10,
        a[i]%=10;
    vi c;
    if (a[0] > 9) c = vec(a[0]/10);
    a[0] %= 10;
    for (int i = 0; i < a.size(); i++)
        c.push_back(a[i]);
    return c;
}

int _greater(vi a, vi b){
    if (a.size() != b.size())
        return (a.size() > b.size()) ? 1 : -1;
    for (int i = 0; i < a.size(); i++){
        if (a[i] > b[i]) return 1;
        if (a[i] < b[i]) return -1;
    }
    return 0;
}

vi operator - (vi a, vi b){
    int n = a.size(), m = b.size();
    for (int i = 1; i <= m; i++){
        a[n - i] -= b[m - i];
        if (a[n - i] < 0 && i < n)
            a[n - i - 1]--;
        a[n - i] += 10;
        a[n - i] %= 10;
    }
    for (int i = m; i < n; i++){
        if (a[n - i] < 0)
            a[n - i - 1]--;
        a[n - i] += 10;
        a[n - i] %= 10;
    }
    vi c;
    if (a[0]) c.push_back(a[0]);
    for (int i = 1; i < a.size(); i++)
        c.push_back(a[i]);
    return c;
}

int main()
{
// #ifndef ONLINE_JUDGE
//  freopen("input.txt","r",stdin);
// //   freopen("output.txt","w", stdout);
// #endif

    int x, y;
    cin >> x >> y;

    vi a = vec(x), xx = vec(x);
    for (int i = 1; i < y; i++) a = a*xx;
    vi b = vec(y), yy = vec(y);
    for (int i = 1; i < x; i++) b = b*yy;
    vi r;
    int ss = _greater(a, b);
    if (ss > 0)
        r = a - b;
    else if (ss < 0)
        cout << "-",
        r = b - a;
    else
        r.push_back(0);

    for (int i = 0; i < r.size(); i++)
        cout << r[i];
}