manojnaidu619

# Problem here -> https://leetcode.com/problems/trapping-rain-water/

height = [0,1,0,2,1,0,1,3,2,1,2,1]   # Elevation map

lm, rm = 0, 0
left, right = 0, len(height)-1
water = 0
        
while left<right:
    if height[left]>lm: lm = height[left]

manojnaidu619

# Problem statement is here -> https://www.geeksforgeeks.org/minimum-number-platforms-required-railwaybus-station/

# Assuming the schedule is already sorted!

arrival = [900, 940, 950, 1100, 1500, 1800]  
departure = [910, 1200, 1120, 1130, 1900, 2000]

# Uncomment these two lines if schedules are not already sorted
#arrival.sort()
#departure.sort()

manojnaidu619

a = [2]
b = [-10,3]

a_pointer = len(a)-1
b_pointer = len(b)-1

for _ in range(len(b)): a.append(0)

l_pointer = len(a)-1

manojnaidu619

# Done using Kadane's Algorithm

nums = [-2, -3, 4, -1, -2, 1, 5, -3]    # Change array here
max_so_far,max_ending_here = 0,0
beg,end=0,0

for x in range(0,len(nums)):
  max_ending_here += nums[x]
  if max_ending_here > max_so_far:
    max_so_far = max_ending_here

manojnaidu619

nums = [3,4,-7,3,1,3,1,-4,-2,-2]   # Change the array here
k = 0                              # Change the sum value here

hashmap = {0:[-1]}
cumsum = 0

def printsubarray(indexarray, index):
  for x in indexarray:
    print(nums[x+1:index+1])

manojnaidu619

nums = [1,2,2,0,1,0,1,1,2,0]

low,mid,high=0,0,len(nums)-1

while mid<high:
  if nums[mid]==0:
    nums[mid],nums[low] = nums[low],nums[mid]
    low+=1
    mid+=1
  elif nums[mid]==1:

manojnaidu619

nums = [0, 0, 1, 0, 1, 1, 0, 1, 0, 0]     # change the array here
i,j=0,len(nums)-1
zeroes, ones = 0,0
flag=0
while i<=j:
  if nums[i]==0:
    zeroes+=1
  else:
    ones+=1

manojnaidu619

presum = {0:1}
cumsum, res = 0,0

for x in nums:
  cumsum += x
  if cumsum-k in presum:
    res += presum[cumsum-k]
  if cumsum in presum:
    presum[cumsum]+=1
  else:

manojnaidu619

const mongoose = require("mongoose")

mongoose.connect("mongodb://127.0.0.1:27017/task-manager-api", {        // establishing DB connection
    useNewUrlParser: true,
    useUnifiedTopology: true,
    useCreateIndex: true
})

const User = mongoose.model('User', {
    name: {

manojnaidu619

// Callback 

const doWorkCallback = (callback) => {
    setTimeout(() => {
        //callback(true)
        callback(false)
    },2000)
}