#include<iostream>
using namespace std;
int main()
{
	long x,s,sc;
	int M, N,*v=new int[100001],i,j,max;
	while (cin >> N >> M){
		s = 0;
		max = 0;
		for (i = 1; i <= N; i++){
			cin >> x;
			v[i] = x%M;
			s += v[i];
		}
		for (i = 1; i <= N; i++){
			sc = s;
			for (j = N; j >= i+max; j--)
			{
				if (sc%M == 0)
					if (j - i +1> max)
						max = j - i + 1;
					else
						break;
				sc -= v[j];
			}
			s -= v[i];
		}
		cout << max<<endl;
	}
	return 0;
}