Infibeam Interview Question for Software Engineer / Developers


Country: India
Interview Type: In-Person




Comment hidden because of low score. Click to expand.
0
of 0 vote

1) If you can use hash table, let's go

hash_table ht = new hash_table;
for (int i = 0; i < n; ++i) {
  int need = A - a[i];
  if (ht.contains(need)) {
    cout << a[i] << ' ' << need;
  } else {
    ht.add(a[i]);
  }
}

It is O(n)
Also you can sort the array and then it is a famous problem.

- Alex Fetisov December 13, 2011 | Flag Reply
Comment hidden because of low score. Click to expand.
0
of 0 vote

;;Given an unsorted array and a number a, find a pair of numbers(b,c) from the arraysch that a=b+c.

(defun find-pair (a lst)
  (if (null lst)
      (format t "Provide list")
      (rec-pair a (car lst) (cdr lst) (cdr lst))))

(defun rec-pair (a b lst olst)
  ;(format t "~A ~A ~A ~A~%" a b lst olst)
  (if (null olst)
      (format t "done searching!")
      (if (null lst)
	  (rec-pair a (car olst) (cdr olst) (cdr olst))
	  (if (= a (+ b (car lst)))
	      (progn 
		(format t "pair for ~A is (~A, ~A)~%" a b (car lst))
		(rec-pair a (car olst) (cdr olst) (cdr olst)))
	      (rec-pair a b (cdr lst) olst)))))

- Anonymous July 21, 2013 | Flag Reply
Comment hidden because of low score. Click to expand.
0
of 0 vote

;;Given an unsorted array and a number a, find a pair of numbers(b,c) from the arraysch that a=b+c.

(defun find-pair (a lst)
  (if (null lst)
      (format t "Provide list")
      (rec-pair a (car lst) (cdr lst) (cdr lst))))

(defun rec-pair (a b lst olst)
  ;(format t "~A ~A ~A ~A~%" a b lst olst)
  (if (null olst)
      (format t "done searching!")
      (if (null lst)
	  (rec-pair a (car olst) (cdr olst) (cdr olst))
	  (if (= a (+ b (car lst)))
	      (progn 
		(format t "pair for ~A is (~A, ~A)~%" a b (car lst))
		(rec-pair a (car olst) (cdr olst) (cdr olst)))
	      (rec-pair a b (cdr lst) olst)))))

- Mahesh Jadhav July 21, 2013 | Flag Reply


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