docs: public static boolean haveCommonElement(int[] arra, int[] arrb,
              int bcount) {
  
          for (int i = 0; i < arra.length; i++) {
              int c = arra[i];
  
              for (int j = 0; j < bcount; j++) {
                  if (c == arrb[j]) {
                      return true;
                  }
              }
          }
  
          return false;
      }