Mathematical Practice

#include<bits/stdc++.h>
using namespace std;
#define ll long long
const ll mod=998244353;
 ll n,m;
ll pow(ll a,ll b)
{
    if(b==0) return 1;
    if(b%2==1) return a*pow(a,b-1)%mod;
    else
    {
        ll mul=pow(a,b/2);
        return mul*mul%mod;

    }
}
int main()
{
    ios::sync_with_stdio(false);


    cin>>n>>m;
    cout<<pow(m+1,n)<<endl;
}