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

#define rd_size() ({long s[18];fstat(0,&s);s[6];})
#define rd_init() char*rp=({char*mmap();mmap(0l,1l<<25,1,2,0,0ll);})
#define rd() ({int _v=0,_c;while(_c=*rp++-48,_c>=0)_v=_v*10+_c;_v;})
#define wt(v) ({unsigned _z=v;do*--wp=_z%10+48;while(_z/=10);})
#define wt1(v) ({char wbuf[64],*wp=wbuf+sizeof wbuf;wt(v);write(1,wp,wbuf+sizeof wbuf-wp);})
#define repeat(e) for(typeof(e)_=e;_--;)
#define MD 998244353

typedef unsigned long ulong;

int main(){
	rd_init();
	char*rp1=rp+rd_size()-1;
	int n=rd();
	int f=0;
	if(*rp=='-'){
		while(rp1[-1]>' '){
			--rp1;
		}
		if(*rp1>'0'){
			char*rp0=rp;
			while(rp0+1<rp1){
				char*p=rp0+(rp1-rp0>>1);
				while(p[-1]>' '){
					--p;
				}
				if(*p=='-'){
					rp0=rp0+(rp1-rp0>>1);
				}else{
					rp1=rp0+(rp1-rp0>>1);
				}
			}
			if(*rp1=='0'){
				f=1;
			}
		}
	}
	n-=f+1;
	ulong z=1;
	repeat(32){
		z=z*z*(n<0?2:1)%MD;
		n<<=1;
	}
	if(f){
		z=z*3%MD;
	}
	wt1(z);
	_exit(0);
}