SDE - Intern

Given an array of numbers, find the maximum sum of any contiguous subarray of the array.

For example, given the array [34, -50, 42, 14, -5, 86], the maximum sum would be 137, since we would take elements 42, 14, -5, and 86.

Given the array [-5, -1, -8, -9], the maximum sum would be -1.

Follow up: Do this in O(N) time.

Given an undirected and disconnected graph G(V, E), containing 'V' vertices and 'E' edges, the information about edges is given using 'GRAPH' matrix, where i-th edge is between GRAPH[i][0] and GRAPH[i][1]. print its DFS traversal.

V is the number of vertices present in graph G and vertices are numbered from 0 to V-1. 

E is the number of edges present in graph G.

Note :

The Graph may not be connected i.e there may exist multiple components in a graph.

You are provided with a Binary Tree and one of its leaf nodes. You have to invert this binary tree. Inversion must be done by following all the below guidelines:

• The given leaf node becomes the root after the inversion.

• For a node (say, ‘x’) 
    ○ If there exists the left child that is not yet taken then this child must become the right child of ‘x’.
    ○ If the left child is already taken then the right child is still on the right side of ‘x’.

• The parent of ‘x’ must be the left child of ‘x’.

For Example:

Consider the above binary tree (image- before inversion), if the given leaf node is ‘1’ then the binary tree after inversion becomes exactly the same as given in the image representing after inversion.

Note:

The given binary tree will only have distinct values of nodes.

You are given two strings 'S' and 'T' of lengths 'N' and 'M' respectively. Find the "Edit Distance" between the strings.

Edit Distance of two strings is the minimum number of steps required to make one string equal to the other. In order to do so, you can perform the following three operations:

1. Delete a character
2. Replace a character with another one
3. Insert a character

Note:

Strings don't contain spaces in between.