Given two sorted arrays of distinct elements, we need to print those elements from both arrays that are not common. The output should be printed in sorted order.
Examples :
Input : arr1[] = {10, 20, 30}
arr2[] = {20, 25, 30, 40, 50}
Output : 10 25 40 50
We do not print 20 and 30 as these
elements are present in both arrays.
Input : arr1[] = {10, 20, 30}
arr2[] = {40, 50}
Output : 10 20 30 40 50
The idea is based on merge process of merge sort. We traverse both arrays and skip common elements.
PHP
<?php// PHP program to find uncommon // elements of two sorted arraysfunction printUncommon($arr1, $arr2, $n1, $n2){ $i = 0; $j = 0; $k = 0; while ($i < $n1 && $j < $n2) { // If not common, print smaller if ($arr1[$i] < $arr2[$j]) { echo $arr1[$i] . " "; $i++; $k++; } else if ($arr2[$j] < $arr1[$i]) { echo $arr2[$j] . " "; $k++; $j++; } // Skip common element else { $i++; $j++; } } // printing remaining elements while ($i < $n1) { echo $arr1[$i] . " "; $i++; $k++; } while ($j < $n2) { echo $arr2[$j] . " "; $j++; $k++; }}// Driver code$arr1 = array(10, 20, 30);$arr2 = array(20, 25, 30, 40, 50);$n1 = sizeof($arr1) ;$n2 = sizeof($arr2) ;printUncommon($arr1, $arr2, $n1, $n2);// This code is contributed by Anuj_67?> |
Output :
10 25 40 50
Time Complexity: O(n1 + n2), where n1 and n2 represents the size of the given two arrays.
Auxiliary Space: O(1), no extra space is required, so it is a constant.
Please refer complete article on Print uncommon elements from two sorted arrays for more details!
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