112_ab_ba.cpp

#include<bits/stdc++.h>
using namespace std;

#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define nline "\n" 
#define int long long
#define fo(i,n) for(int i = 0;i<n;i++)
#define pb push_back
#define F first
#define S second
typedef long double ld;
typedef vector<signed> vi;
typedef vector<vector<signed>> vvi;
typedef vector<int> vll;
typedef vector<vector<int>> vvll;
const int mod = 1e9+7;
long double pi = acos(-1.0); const double EPS = 1e-9;

int myceil(int a , int b){return (a+b-1)/b;}
int myround(int a , int b){return (2*a+b)/(2*b);}

int binexp(int base, int exp) {
    int res = 1;
    while (exp > 0) {
        if (exp % 2 == 1) res *= base;
        base *= base;
        exp /= 2;
    }
    return res;
}

void solve(){
    int a,b;
    cin >> a >> b;
    int solution = binexp(a,b) - binexp(b,a);
    cout << solution;
}

signed main(){
    IOS;

    #ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout); 
    #endif
    
    solve();
    

}