CareerCup

April Google Interview 3/4
Maze
N,M array
Level 1 0,0 to N-1,M-1 => Path exsits?
Level 2 if path exists then print path
Level 3 if path exists then print min cost path
Level 4 O(nm log mn) using Priority Queue.

You are given a string S consisting of lowercase English letters denoting different types of candies. A substring of a string S is a string S' that occurs in S. For example, "bam" is a substring of "babammm". Each candy costs 1 unit. You can pick some continuous candies such that you can create a palindrome of length K by using some or all picked candies. Your task is to find the minimum cost to create a palindrome of length K.



Input Format:

First line contains string S.

Next line contains an integer T denoting the number of test cases.

Next T lines contain a single integer K.



Output Format:

For each test case, print minimum cost as mentioned above. If you cannot create a palindrome of length K then, simply print -1.



Constraints:
Constraints:

1≤|S|≤10^5
1≤T≤10
1≤K≤10^5



Sample Input
babammm
2
2
5
Sample Output
2
5
Explanation
Test Case 1: You can pick candies denoted by "mm" and create a palindrome of size 2. So the cost will be 2 units.

Test Case 2: You can pick candies denoted by "babam" and rearrange them, "bamab", to create a palindrome of size 5. So the cost will be 5 units.

You are given a string S consisting of lowercase English letters denoting different types of candies. A substring of a string S is a string S' that occurs in S. For example, "bam" is a substring of "babammm". Each candy costs 1 unit. You can pick some continuous candies such that you can create a palindrome of length K by using some or all picked candies. Your task is to find the minimum cost to create a palindrome of length K.



Input Format:

First line contains string S.

Next line contains an integer T denoting the number of test cases.

Next T lines contain a single integer K.



Output Format:

For each test case, print minimum cost as mentioned above. If you cannot create a palindrome of length K then, simply print -1.



Constraints:
Constraints:

1≤|S|≤10^5
1≤T≤10
1≤K≤10^5



Sample Input
babammm
2
2
5
Sample Output
2
5
Explanation
Test Case 1: You can pick candies denoted by "mm" and create a palindrome of size 2. So the cost will be 2 units.

Test Case 2: You can pick candies denoted by "babam" and rearrange them, "bamab", to create a palindrome of size 5. So the cost will be 5 units.

/**
* Definition for a binary tree node.
* public class TreeNode {
* int val;
* TreeNode left;
* TreeNode right;
* TreeNode(int x) { val = x; }
* }
*/

Find the largest duplicate subtree in a binary tree


For example,

        1
       / \
      2   3
     /   / \
    4   2   4
       /
      4
The following are two duplicate subtrees:

      2
     /
    4
and

    4

but the former is the largest, thus return the root of the first subtree

Write a function that receives string with decimal number (i.e. all characters are decimal digits) and prints the sum of all possible substring-numbers, example:
sum(“123”) = 123 + 12 + 23 + 1 + 2 + 3 = 167

Given N number of Strings, generate all combination of these String's characters, these Strings must be N long, and must contain only one number of char from each string.

example: "abc", "def", "ghi" --> adg, adh, adi, aeg ... cfg

Given a target string, an input request replaces the word after the given index a->b such as:
Target string: "Hello world!"
Input:{s:0, a:Hello b: Goodbye}
Output:"Goodbye world!".
The requirement is that input be given to several words that need to be changed at one time: {{s:0,a:Hello,b:Goodbye},{s:11,a:!,b:?},{s:6 a: World,b:friend}}
And each modified index is based on the original unmodified target string so the end result is
"Goodbye friend?"

given a n-ary tree, find the total distance from this node to any other nodes

class TreeNode {
int val;
List<TreeNode> children;
TreeNode(int val) {
this.val = val;
children = new ArrayList<>();
}
}


public int findDistance(TreeNode root, TreeNode node) {

}

How many squares are inside a m*n rectangle where some grids in the rectangle were grey and the gray grid could not appear in the small squares.

Given an int array, check if all the numbers can be divided into 5 consecutive numbers.
Eg: [1,2,2,3,3,4,4,5,5,6] Yes: (1,2,3,4,5) (2,3,4,5,6)
Followup: ask if you know that all the numbers are between 1 and 13,
what's a good optimization.

You have two matrixs, how to move the first matrix
(move up, down, left, and right) so that the two matrix in the two matrixs match most.

eg:
matrix 1:                matrix 2:
0 0 1                    0 0 0  
0 1 1                    1 1 0  
0 0 0                    1 1 0

Then, after taking matrix1 (1 left shift + 1 down),
the number of 1 in the match with matrix2 is 3

how to check if two graphs are structurally identical

class UndirectedGraphNode {

List<UndirectedGraphNode> neighbors;
UndirectedGraphNode() {
neighbors = new ArrayList<>();
}
}

Table: Customers
id | name

1|alice
2|bob
3|carol

Table: Orders
id | customer_id | content

1|1|House
2|2|car
3|2|dog
4|10|cow

please write a query which returns all of the invalid orders (where invalid means their customer_id does not have an associated customer)

4|10|cow

Suppose you have a list of tasks which need to be executed. Some of these tasks have dependencies which must be executed before they are. Please provide a method which, when given a list of tasks, will provide a valid ordering in return.

Example:
Input: [ A, B, C, D ]
A <- B, C
B <- C, D
D <- C
Return: [ C, D, B, A ]

There are N (N > 20) team, each team will play 'M' (say M =3) league match against every other team. Design various classes, and write the code and algorithm to find the winner.

Note: One match can be played on a single day, as there is just one stadium.
Note: No team should play matches on consecutive days.
Note: Algorithm should come up with Quarter Final, Semi Final, and Final matches.

Follow-up Question: If N is odd or even.
How your design will be modified if there are 'S' no. of stadiums.

convert a Sorted array to complete BST

Design a Twitter-like topic system so that the most popular topics can be retrieved from the system. A post can have one or more topics and these topics can be shared by multiple posts. (hint: thinking of scalability)

How HP Customer Support Works for Users?

Given six digits, find the earliest valid time that can be displayed on a digital clock (in 24-hour format) using those digits.

For example, given digits 1, 8, 3, 2, 6, 4 the earliest valid time is "12:36:48". Note that "12 : 34 : 68" is not a valid time.

Write a java method:

class Solution {

public String solution(int A, int B, int C, int D, int E, int F);

}


that, given six integers A, B, C, D, E and F, returns the earliest valid time in "HIT :mm: ss" string format, or "NOT POSSIBLE" if it is not possible to display a valid time using all six integers.

For example, given 1, 8, 3, 2, 6, 4 the function should return "12:36:48".

Given 0, 0, 0, 0, 0, 0, the function should return "00 : 00 : oo". Given 0, 0, 0, 7, 8, 9, the function should return "07:08:09".

Given 2, 4, 5, 9, 5, 9, the function should return "NOT POSSIBLE".

Assume that: • A, B, C, D, E and F are integers within the range [0..9].

Correct answer 1 point
Efficient solution 2 points

Give a connected graph, no cycle,
Find the node where the average distance from all other nodes is the smallest

Input: an int array without sorting, then do a binary search on it, and find the number of digits that cannot be found by binary search.

<key = "a"; val = "3"; depend_list = null;/>; <key = "b"; val = "a * a";
Depend_list = {a};/>; <key = "c"; val = "a * b"; depend_list = {a,b};/>;
Lets output a map<key, value>,a -> 3, b -> 9, c -> 27
Follow-up questions: Make a statistic for all keys and corresponding map entries with the same value.

Given an array, find an x such that all numbers less than x are equal to themselves. Numbers greater than it are equal to x, and all numbers add up to a target
For example, [1 3 5 7 9] target=24, answer is8. Because when x=8, the array has only 9>8, so 1+3+5+7+8=24 is the closest to the target.

Give an N-length array with only 0 and 1 inside
Requires to find the minimum number of conversions needed to convert the array to 0 before all 1.
The conversion is to change a 0 to 1 or a 1 to 0,
And the number of 0 and 1 in the converted array can be arbitrary.
Just find the minimum conversion step

Assume courses labeled by their index in an array. Given a list of pairs where the first element represents a prerequisite course required for the second course, derive an ordered list of courses.

For a given set of non-negative integers get the number of subsets that add up to a target value k.

For a given array of integers compute the maximum sum of any range in the array. Then modify the function to find maximum product (note the effect of negatives on max product).

Write a function to compute n^k. (don't forget negative exponents)

Print (or return) the longest movie title found by successively matching the last and first words in each title, joining to form new titles, given a file containing a list of movie titles.
For example: 'OF MICE AND MEN' and 'MEN IN BLACK' join to form 'OF MICE AND MEN IN BLACK'.
You could further join 'OF MICE AND MEN IN BLACK' wth 'BLACK MASS' to form 'OF MICE AND MEN IN BLACK MASS'.

The longest title I found (at 143 characters is): WENT TO CONEY ISLAND ON A MISSION FROM GOD BE BACK BY FIVE WIVES THREE SECRETARIES AND ME WITHOUT YOU CANT TAKE IT WITH YOU WERE NEVER LOVELIER

Problem:

Insert + or – sign anywhere between the digits 123456789 in such a way that the expression evaluates to 100. The condition is that the order of the digits must not be changed.

e.g.: 1 + 2 + 3 – 4 + 5 + 6 + 78 + 9 = 100

I have below C solution - Can you please help me to convert to Java. I need this solution in Java.


#include<stdio.h>
#include<conio.h>
int findnumber(int i,int j)
{
int k;
int n;
for(k = 0; k < j; k++)
{
n = i % 3;
i = i / 3;
}
return n;
}
void main()
{
int i, j, k, current, result, operation;
clrscr();
for(i = 0; i < 19683; i++)
{
if(i%3 == 0)
continue;
current = 0;
result = 0;
for(j = 1; j < 10; j++)
{
k = findnumber(i,j);
if(k==0)
{
current = current * 10 + j;
}
else
{
result = result + (operation == 1 ? current : -current);
current = j;
operation = k;
}
}
result = result + (operation == 1 ? current : -current);
if(result == 100)
{
for(j = 1; j < 10; j++)
{
k = findnumber(i,j);
if(k==0)
printf("%d",j);
else
printf("%c%d",k==1?'+':'-',j);
}
printf("\n");
}
}
getch();
}