arr +++

// 1 3 2 6 1 2


function processData(input) {
    
    array = input.split("\n")
    n_k   = array[0].split(" ")
    k     = Number(n_k[1])
    arr   = array[1].split(" ")
    count = 0

    for (let i = 0; i < arr.length; i++) {
        for (let j = i + 1; j < arr.length; j++) {
            if ((Number(arr[i])  + Number(arr[j])) % k == 0 )  
            {
                count++
            }
            
        }
        
    }


    console.log(count)


 }
        
 process.stdin.resume();
 process.stdin.setEncoding("ascii");
 _input = "";
 process.stdin.on("data", function (input) {
     _input += input;
 });
 
 process.stdin.on("end", function () {
    processData(_input);
 });