// 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);
});
