#define MD 998244353 { Combc; c.expand_fact(1d5+1); int @n; Mint @m; int @k; Mint w=c.fac(m)*c.ifac(m-k); Mint z; REP(i,k+1)z=m**n*c.ifac(i)*c.ifac(k-i)-z,m+=1; wt(z*w); }