MOD = 998244353 def main(): import sys input = sys.stdin.read().split() idx = 0 N = int(input[idx]); idx +=1 M = int(input[idx]); idx +=1 K = int(input[idx]); idx +=1 A = list(map(lambda x: int(x)%K, input[idx:idx+N])) idx +=N # Precompute the sliding windows # For each window, compute the DP for k in range(N-M+1): current_A = A[k:k+M] dp = [0]*K dp[0] = 1 # 初始空序列 for num in current_A: new_dp = dp.copy() for j in range(K): new_dp[(j + num) % K] = (new_dp[(j + num) % K] + dp[j]) % MOD dp = new_dp ans = (dp[0] -1) % MOD # 减去空序列 print(ans) if __name__ == "__main__": main()