microsoft

Rotate a matrix by 90 degree without using any extra space(Anticlockwise)

Rotate a matrix by 90 degree without using any extra space(Anticlockwise)

(Asked by MICROSOFT, PAYTM, SAMSUNG, AMAZON, SNAPDEAL…)

Merge Sort in Java

Like QuickSort, Merge Sort also divide and conquer algorithm. It divides input array in two halves, calls itself for the two halves and then merges the two sorted halves. The merge() function is used for merging two halves. The merge(arr, left, mid, right) is key process that assumes that arr[left..mid] and arr[mid+1..right] are sorted and merges the two sorted sub-arrays into one.