#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

char*mmap();
#define RD(v) long v=0;{int _c;while(_c=*rp++-48,_c>=0)v=v*10+_c;}

#define WTHI(v) {long _z=v,_n=0,_d=0;while(++_n,_d=_d<<8|0x30|_z%10,_z/=10);*(long*)wp=_d;wp+=_n;}
#define WTLO(v) {long _z=v,_n=8,_d=0;while(_d=_d<<8|0x30|_z%10,_z/=10,--_n);*(long*)wp=_d;wp+=8;}
#define WT(v) if(v>=100000000){WTHI(v/100000000);WTLO(v);}else{WTHI(v);}

#define MD 998244353

main(){
	char*rp=mmap(0l,1l<<28,1,2,0,0ll);
	while(*rp++>=48);
	RD(k);
	k%=MD-1;
	long b=1;
	for(long j=1l<<30;j>>=1;){
		b=b*b%MD;
		if(k&j){
			b*=2;
		}
	}
	long s=0;
	do{
		RD(a);
		s+=a;
	}while(*rp);
	long z=s%MD*b%MD;
	char wbuf[16],*wp=wbuf;
	WT(z);
	write(1,wbuf,wp-wbuf);
	_exit(0);
}