distinct-elements

import java.util.; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int tc = sc.nextInt(); while(tc -- > 0) { int n = sc.nextInt(); HashMap<Integer,Integer> mp = new HashMap<>(); for(int i=0; i<n; i++) { int arr = sc.nextInt(); mp.put(arr,mp.getOrDefault(arr,0)+1); } long result=1; for(Map.Entry e : mp.entrySet()) { int y = (int) e.getValue(); if(y==1) result=result2; else result=result*(1+ y); result%=1000000007; } System.out.println(result-1); } } }