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

char*mmap();
char wbuf[1<<25];

#define rd_skip() while(*rp++>=48)
#define rd(v) long v=0;{long _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

int d[1000002];

void f0(){
	long b=650;
	long c=1300;
	long m=1300;
	for(long n=2;n<=1000000;){
		d[n++]=b;
		d[n++]=c;
		m=m*26%MD;
		b=(b*26+m+(MD-650))%MD;
		c=(c*26+m)%MD;
	}
}

void f1(){
	char*rp=mmap(0l,1l<<25,1,2,0,0ll);
	char*wp=wbuf;
	rd_skip();
	while(*rp){
		rd(n);
		wt(d[n]);
		*wp++='\n';
	}
	write(1,wbuf,wp-wbuf);
}

main(){
	f0();
	f1();
	_exit(0);
}