#include #include #include using namespace atcoder; using mint = modint998244353; using namespace std; #define rep(i,n) for (int i = 0; i < (n); ++i) #define Inf32 1000000001 #define Inf64 1000000000000000001 int main(){ int N,M,K; cin>>N>>M>>K; vector a(N); rep(i,N)cin>>a[i]; for(int i=M-1;i(K,0)); ldp[0][0] = 1; rep(j,M){ int A = a[i-j]; rep(k,K){ ldp[j+1][k] += ldp[j][k]; ldp[j+1][(k+A)%K] += ldp[j][k]; } } vector rdp(K,0); rdp[0] = 1; int cur = i+1; while(ldp.size()>0){ mint ans = 0; rep(j,K){ ans += ldp.back()[j] * rdp[(K-j)%K]; } cout<<(ans-1).val()<=N)break; vector ndp(K,0); rep(j,K){ ndp[j] += rdp[j]; ndp[(j+a[cur])%K] += rdp[j]; } swap(ndp,rdp); cur++; } } return 0; }