#include #include #include using namespace atcoder; using mint = modint998244353; using namespace std; #define rep(i,n) for (int i = 0; i < (n); ++i) #define Inf 1000000001 int main(){ int N,M; cin>>N>>M; vector A(N); map S; rep(i,N){ cin>>A[i]; S[A[i]]++; } cout<