who can tell me where is my 4 pts?

#include<bits/stdc++.h>
#define int long long
using namespace std;
const int N=5e4+100,pq=998244353;
int c,t,n,m,a[N];
int p(int a,int b){
	int res=1;
	while(b){
		if(b&1)res=res*a%pq;
		a=a*a;
		b>>=1;
	}
	return res%pq;
}
signed main(){
	cin>>c>>t;
	while(t--){
		cin>>n>>m;
		for(int i=1;i<=n;i++){
			cin>>a[i];
		}
		cout<<p(2,n)<<'\n';
	}
	return 0;
}