rajan596

## SHELL SCRIPT
## Mainly Questions from HackerRank
##

# Print anything
$ echo "HELLO"

# time when i logged in ?
$ who am i
o/p : username terminal_id time

rajan596

class Solution {
public:
    int getMoneyAmount(int n) {
        int dp[n+1][n+1];
        
        memset(dp,0,sizeof(INT_MAX));
        
        for(int i=1;i<=n;i++){
            dp[i][i]=0;
        }

rajan596

/**
 * Definition for a binary tree node.
 * struct TreeNode {
 *     int val;
 *     TreeNode *left;
 *     TreeNode *right;
 *     TreeNode(int x) : val(x), left(NULL), right(NULL) {}
 * };
 */
class Codec {

rajan596

class Solution {
public:
    int maxCoins(vector<int>& v) {
        int n=v.size();
        if(n==0) return 0;
        
        int dp[n][n];
        
        for(int len=1;len<=n;len++) {
            for(int left=0;left+len-1<n;left++){

rajan596

class Stack {
public:
    queue<int> q;
    int size;

    Stack(){
        size=0;    
    }
    
    // Push element x onto stack.

rajan596

Algorithm ::

Variables :
L = 0
R = 0
currentSum = 0
maxSum = 0   // keep track of max sum
// max sum sub matrix indexes
left   = 0   
right  = 0

rajan596

/*
matrix chain Multiplication
  1           2        3
[2 , 3]    [3 , 4]  [4 , 5]
 p0 p1      p1 p2    p2 p3
*/
 
#include<bits/stdc++.h>
 
using namespace std;

rajan596

#include<bits/stdc++.h>

using namespace std;

struct Node {
    char data;
    Node *left,*right,*eq;
    bool isEnd;

    Node(char c){

rajan596

class Solution {
public:
    int calculate(int a,int b,char c){
        switch(c) {
            case '+': return a+b;
            case '-': return a-b;
            case '*': return a*b;
            case '/': 
                if(b!=0) return a/b;
                else return 0;

rajan596

1. return statement can't be used with ternary operator.

2. max length of variable is 31 characters.

3. sizeof((int)(double)(char)i) is 4 bytes. Because at the end it is type casted into int.

4. Modulo operator gives remainder after dividing numerator with denominator and result has sign of numerator.
    10   %   3  =  1
    10   %  -3  =  1
   -10   %   3  = -1