storecredit.java

import java.util.Scanner;

class test {
  public static void main(String[] args) {
  
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    
    for(int l = 0; l < n; l++) {
      int C = sc.nextInt();
      int nitems = sc.nextInt();
      int items[] = new int[nitems];
      
      for(int m = 0; m < nitems; m++) {
      	items[m] = sc.nextInt();
      }
      for(int i = 0; i < nitems; i++) {
        for(int j = i+1; j < nitems; j++) {
          if(items[i] + items[j] == C) {
            System.out.println("Case #" + (l+1) + ": " + (i+1) + " " + (j+1));
            break;
          }
        }
      }
    }
    
  }
}