using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;

class Myon
{
    public Myon() { }
    public static int Main()
    {
        cin = new Scanner();
        new Myon().calc();
        return 0;
    }


    static Scanner cin;

    int N, K;
    int[] A;

    void calc()
    {
        N = cin.nextInt();
        K = cin.nextInt();
        A = Console.ReadLine().Split().Select(int.Parse).ToList().ToArray();
        int[] amount = new int[N+1];
        for(var i = 0;i < N; i++)
        {
            amount[i + 1] += amount[i] + A[i];
            amount[i + 1] %= K;
        }
        // 先頭は必ず0になる
        long ans = 0;
        long[] count = new long[K];
        for(int i = 0;i < N; i++)
        {
            ans += count[amount[i + 1]];
            count[amount[i + 1]] += 1;
        }
        
        Console.WriteLine(ans + count[0]);

        Console.ReadLine();
    }
    class Scanner
    {
        string[] s;
        int i;

        char[] cs = new char[] { ' ' };

        public Scanner()
        {
            s = new string[0];
            i = 0;
        }

        public string next()
        {
            if (i < s.Length) return s[i++];
            string st = Console.ReadLine();
            while (st == "") st = Console.ReadLine();
            s = st.Split(cs, StringSplitOptions.RemoveEmptyEntries);
            if (s.Length == 0) return next();
            i = 0;
            return s[i++];
        }

        public int nextInt()
        {
            return int.Parse(next());
        }
        public int[] ArrayInt(int N, int add = 0)
        {
            int[] Array = new int[N];
            for (int i = 0; i < N; i++)
            {
                Array[i] = nextInt() + add;
            }
            return Array;
        }

        public long nextLong()
        {
            return long.Parse(next());
        }

        public long[] ArrayLong(int N, long add = 0)
        {
            long[] Array = new long[N];
            for (int i = 0; i < N; i++)
            {
                Array[i] = nextLong() + add;
            }
            return Array;
        }

        public double nextDouble()
        {
            return double.Parse(next());
        }


        public double[] ArrayDouble(int N, double add = 0)
        {
            double[] Array = new double[N];
            for (int i = 0; i < N; i++)
            {
                Array[i] = nextDouble() + add;
            }
            return Array;
        }
    }
}
