ejcer

public static boolean isBST(Node head){
  if(head == null){
    return false;
  }else{
    return isBST(head, Integer.MIN_INTEGER, Integer.MAX_INTEGER);
  }
}

private static boolean isBST(Node head, int min, int max){
  if(head == null){

ejcer

public static void rotateArr(int[][] mat, int n){
			if (mat == null){
				return;
			}
			
			for(int i = 0; i < n/2; i++){
				int last = n-1-i;
				int len = n-1;
				for(int j = i; j<last;j++){
					int offset = j-i;

ejcer

public static int[] merge(int[] a, int[] b) {

    int[] answer = new int[a.length + b.length];
    int i = 0, j = 0, k = 0;

    while (i < a.length && j < b.length)
    {
        if (a[i] < b[j])       
            answer[k++] = a[i++];

ejcer

              5
        /            \
        2             6
    /      \
    1       3
             \
              4

ejcer

              5
        /            \
        2             6
    /      \
    1       3
             \
              4

ejcer

def main():
    PF1 = "124*+3-22+-3/2/3*"
    PF2 = "65-4*54/7*+9-9-"
    global tos
    tos = -1

    def push(s, elem):
        global tos
        tos = 1+tos

ejcer

# Gather some data that is of interest to you.
# Analyze the data using a scatterplot matrix. List at least 3 non-trivial
#findings about the data, along with plot pictures that show the findings.


### Imports ###
import numpy as np
import pandas as pd
from pandas import Series, DataFrame
import os

ejcer

#class survey data surveyV01.csv
#Use Pandas to clean all the problems you can find in the data and write a
#single clean surveyCleaned_LastName.csv file.

#Submit a list of all the types of problems you found, and for each problem
#show the Python code you used to fix it, in the textbox.


### Imports ###
import numpy as np

ejcer

# Gather some data that is of interest to you.
# Analyze the data using a scatterplot matrix. List at least 3 non-trivial
#findings about the data, along with plot pictures that show the findings.


### Imports ###
import numpy as np
import pandas as pd
from pandas import Series, DataFrame
import os

ejcer

28                  Nevada
30              New Jersey
6              Connecticut
32                New York
38            Pennsylvania
22                Michigan
13                Illinois
14                 Indiana
11                  Hawaii
9                  Florida