#include using namespace std; #define int long long const int p=998244353; const int maxn=2e5+5; int po(int a,int b) {if(b==0) return 1; if(b==1) return a; if(b%2==0) {int u=po(a,b/2);return (u*u)%p;} else {int u=po(a,b-1);return (a*u)%p;}} int inv(int x) {return po(x,p-2);} int fact[maxn];int invf[maxn];int invm[maxn]; int32_t main() { ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0); fact[0]=1;for(int i=1;i=0;--i) {invf[i]=(invf[i+1]*(i+1))%p;} for(int i=1;i>k; int n=10; int res[901]={0}; for(int a=1;a<=n;++a) { int pok=po(a,k); for(int b=1;b<=a;++b) { for(int c=1;c<=b;++c) { int ways=((((((((((invf[c]*invf[b+1])%p)*(b-c+1)%p)*invf[a+2])%p)*(a-c+2))%p)*(a-b+1))%p)*fact[a+b+c])%p; res[a+b+c]+=pok*((ways*ways)%p);res[a+b+c]%=p; } } } cout<