├── 1. Placement Guide.pdf ├── 2. CP Handbook.pdf ├── 3. 450QuestionsByLoveBabbar.xlsx ├── 4. CSE CORE IMPORTANT.pdf ├── Dynamic Programming ├── LIS.txt ├── Maximal Square.md ├── Maximum Sum Increasing Subsequence.md └── ques-solutions.md ├── LICENSE ├── README.md └── TUF.pdf /1. Placement Guide.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Anupriya1729/JobPrep/a915c13f1303eb5daea0d33317d4a1c34e1097b2/1. Placement Guide.pdf -------------------------------------------------------------------------------- /2. CP Handbook.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Anupriya1729/JobPrep/a915c13f1303eb5daea0d33317d4a1c34e1097b2/2. CP Handbook.pdf -------------------------------------------------------------------------------- /3. 450QuestionsByLoveBabbar.xlsx: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Anupriya1729/JobPrep/a915c13f1303eb5daea0d33317d4a1c34e1097b2/3. 450QuestionsByLoveBabbar.xlsx -------------------------------------------------------------------------------- /4. CSE CORE IMPORTANT.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Anupriya1729/JobPrep/a915c13f1303eb5daea0d33317d4a1c34e1097b2/4. CSE CORE IMPORTANT.pdf -------------------------------------------------------------------------------- /Dynamic Programming/LIS.txt: -------------------------------------------------------------------------------- 1 | // Longest Increasing Subsequence (LIS) 2 | 3 | Method 1: 4 | Brute Force 5 | 6 | Idea: Consider all the subsequences, find the increasing ones, then find the one with maximum length 7 | Time Complexity: exponential 8 | Every element has 2 choices -> consider it, don't consider it 9 | i.e O(2^n) 10 | 11 | Method 2: 12 | Dynamic Programming 13 | 14 | Idea: 15 | Find the LIS ending with very element. 16 | Since, we are palying with 1 parameter only i.e. length 17 | So, it will be a 1-D DP 18 | 19 | example: 20 | { 3, 4, 2, 8, 10 } 21 | 0 1 2 3 4 22 | 23 | dp[] : 1 1 1 1 1 --> each number is a subsequence itself 24 | 1 2 1 1 1 --> add 1 to the current cell if this can extend the previous sequence otherwise do nothing 25 | 1 2 1 1 1 26 | 1 2 1 3 1 27 | 1 2 1 3 4 --> maximum of all these values will give the result 28 | 29 | TIME COMPLEXITY: O(n^2) 30 | SPACE COMPLEXITY: O(n) 31 | 32 | #include 33 | using namespace std; 34 | 35 | int LIS(vector &input) 36 | { 37 | int n= input.size(); 38 | if(n==0) 39 | { 40 | return 0; 41 | } 42 | int dp[n]; 43 | dp[0]=1; 44 | for(int i=1;iinput[j]) 49 | { 50 | dp[i]=max(dp[i],1+dp[j]) 51 | } 52 | } 53 | } 54 | int length_of_lis=0; 55 | for(int i=0;i &input) 82 | { 83 | int n= input.size(); 84 | if(n==0) 85 | { 86 | return 0; 87 | } 88 | vector lis; 89 | lis.push_back(input[0]); 90 | for(int i=1;ihttps://leetcode.com/problems/maximal-square/ 4 |
 5 | Explanation:
 6 | Maximal Square --> optimization problem
 7 | DP
 8 | properties: 
 9 | Overlapping subproblems --> 
10 | Optimal Substructure
11 |  
12 | Property of a square:
13 | Length of row col and diagonal is same.
14 | 	
15 | DP can only be applied if we use previously calculated solutions to build the current solution.
16 | We need to look at 3 directions in our dp array:
17 | 		      \ |
18 | 	            ___\|
19 | find minimum in all three directions.--> this is done because if any of them is zero then min will be 0 which will imply that square cannot be extended.
20 | to check whether by adding current 1 can be extend the size of existing submatrix.  
21 |   -> we do it by looking at the min of
22 |      vertical length , horizontal length, diagonal length 
23 |     
24 | We maintain a variable to keep track of largest square edge till now.
25 | 
26 | arr                dp array
27 |  1 0 1 0 0         1 0 1 0 0
28 |  1 0 1 1 1    -->  1 0 1 1 1
29 |  1 1 1 1 1         1 1 1 2 2
30 |  1 0 0 1 0         1 0 0 1 0
31 | 
32 | 
33 | largest  --> to keep track of the largest  till now
34 | at the end largest will store 2 --> which is the edge length of square, since we need area so we return largest* largest
35 | 
36 | 
37 | Time : O(mn)
38 | Space : O(mn) --> it can be optimised by using BINARY INDEXING
39 |                     because we actually need only 2 rows
40 |                     O(m) after optimization
41 | 
42 | Solution: 43 | https://ideone.com/SXdqmO 44 | -------------------------------------------------------------------------------- /Dynamic Programming/Maximum Sum Increasing Subsequence.md: -------------------------------------------------------------------------------- 1 | This Question is a variation of LIS problem all we need to do is take sum as a criteria instead of length. 2 | Visit that problem first before moving to this question. 3 | 4 |
 5 | Sample Input:
 6 | {1, 4 , 3 , 0, 100, 2 , 1}
 7 | Output: 
 8 | 1 4 100 --> 105
 9 | 
10 | Sample Input:
11 | {1, 4 , 3 , 0, 100, 2 , 1}
12 | Output: 
13 | 105
14 | 
15 | Sample Input:
16 | {1, 2 , 3 , 5}
17 | Output: 
18 | 11
19 | 
20 | Sample Input:
21 | {5,4,2,0}
22 | Output: 
23 | 5
24 | 
25 |
26 | Solution: https://ideone.com/dIpCi0
27 | 
28 | -------------------------------------------------------------------------------- /Dynamic Programming/ques-solutions.md: -------------------------------------------------------------------------------- 1 | https://leetcode.com/problems/min-cost-climbing-stairs/discuss/476388/4-ways-or-Step-by-step-from-Recursion-greater-top-down-DP-greater-bottom-up-DP-greater-fine-tuning 2 | 3 | Questions-
4 | 1. Fibonacci
5 | 2. Divisor Game
6 | 3. Min Cost to Climb
7 | https://leetcode.com/problems/min-cost-climbing-stairs/submissions/
8 | 4. Number of ways to climb stairs
9 | https://leetcode.com/problems/climbing-stairs/solution/ -->answer is fibonacci sequence
10 | 5. Maximum Sum Subarray
11 | https://leetcode.com/submissions/detail/373126210/
12 | 6. Range Sum Query
13 | https://leetcode.com/problems/range-sum-query-immutable/submissions/
14 | 7. Houses & Robbers
15 | https://leetcode.com/problems/house-robber/discuss/156523/From-good-to-great.-How-to-approach-most-of-DP-problems.
16 | 8. Best time to buy and sell stocks
17 | 18 | 9. LCS
19 | Methods- Recursive, Memoization, Tabulation, Space Optimized tabulation
20 | https://leetcode.com/problems/longest-common-subsequence/submissions/
21 | https://www.youtube.com/watch?v=LAKWWDX3sGw&t=379s
22 | https://www.youtube.com/watch?v=DuikFLPt8WQ
23 | 24 | 10. Number of ways to create a sum from infinite supplies of some coins
25 | https://ideone.com/sUupze
26 | https://ideone.com/DKsNB7
27 | 28 | 11. Edit Distance
29 | https://leetcode.com/problems/edit-distance/submissions/
30 | 31 | 12. Longest Increasing Subsequence
32 | https://leetcode.com/problems/longest-increasing-subsequence/
33 | 34 | 13. Coin change 2 --> Number of ways to give changes with infinite supply of 'x' coins
35 | https://leetcode.com/problems/coin-change-2/
36 | 37 | 14. Coin Change 1 --> Find the fewest number of coins required from infinite supplies of 'x' coins
38 | https://leetcode.com/problems/coin-change/submissions/
39 | 40 | 15. Maximum cuts
41 | 42 | 16. Minimum Jumps
43 | https://www.youtube.com/watch?v=IKxezpfH4aw
44 | 45 | 17. 0-1 Knapsack
46 | https://www.interviewbit.com/problems/0-1-knapsack/
47 | 48 | 18. Edit Distance
49 | https://www.youtube.com/watch?v=AuYujVj646Q
50 | https://leetcode.com/problems/edit-distance/submissions/
51 | 52 | 19. Maximum Sum Increasing Subsequence
53 | https://ideone.com/dIpCi0
54 | https://www.geeksforgeeks.org/maximum-sum-increasing-subsequence-dp-14/
55 | 56 | 20. Minimum sum path
57 | https://www.geeksforgeeks.org/min-cost-path-dp-6/
58 | https://leetcode.com/problems/minimum-path-sum/discuss/23457/C%2B%2B-DP
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This repo contains my personal suggestions on how someone can prepare for placements.
 2 | The Placement Guide contains all the important things (according to me) 
 3 | that a student should know about placements.
 4 | To access the links in the pdf
 5 | Open the Placement Guide file on laptop -> click on download -> open it on your laptop.
 6 | I'll keep updating the pdf according to the latest information so keep an eye on the 
 7 | update date mentioned on 1st page of the pdf.
 8 | 
 9 | I personally struggled a lot when I started. I faced a lot of problems in figuring out what to do 
10 | and how the placement process looks like.
11 | I have prepared this pdf so that the upcoming batches do not face such problems.
12 | 
13 | Best Youtube Channels:
14 | 1. take U forward
15 |     https://www.youtube.com/results?search_query=take+u+forward
16 | 
17 | 2. TECH DOSE
18 |     https://www.youtube.com/channel/UCnxhETjJtTPs37hOZ7vQ88g
19 |     
20 | 3. Code NCode
21 |     https://www.youtube.com/channel/UC0zvY3yIBQTrSutsV-4yscQ
22 | 
23 | 4. Rachit Jain
24 |     https://www.youtube.com/channel/UC9fDC_eBh9e_bogw87DbGKQ
25 | 
26 | ✅ SDE SHEET (to be solved before interviews): https://bit.ly/takeUforward_SDE
27 | 
28 | To know about job opportunities:
29 | https://www.youtube.com/user/ARSHG1998
30 | 
31 | Best Blog for DP:
32 | https://leetcode.com/discuss/general-discussion/458695/dynamic-programming-patterns 
33 | 
34 | Backtracking:
35 | https://leetcode.com/discuss/interview-question/1098081/Famous-Backtracking-Problems 
36 | 
37 | 
38 | 

You can also book a 1:1 mentorship session with me for more guidance:

39 | https://unstop.com/mentor/anupriya 40 |
41 | -------------------------------------------------------------------------------- /TUF.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Anupriya1729/JobPrep/a915c13f1303eb5daea0d33317d4a1c34e1097b2/TUF.pdf --------------------------------------------------------------------------------