coding-challenge

ID	Problem Name	Constraints	Difficulty_level
55	Reverse String	1 <= \|s\| <= 10000	Easy
56	count vowel	1 <= Length of S <= 10^5	Medium
57	Maximum Sub Array	-10^4 <= A[i] <= 10^4	Easy
58	Remove duplicates from a sorted array.	1 ≤ N ≤ 104	Easy
35	Reverse a Linked List	The list size will not exceed 1000.	Easy
59	Fibonacci	1<=100000	Easy
60	Prime Number		Easy
61	unique characters		Easy
62	Sum of Unique Elements	1 ≤ n ≤ 1000 1 ≤ a i ≤ 1000	Easy
63	Armstrong Number Checker		Easy
64	First Non-Repeated Character	1 <= \|s\| <= 10000	Medium
65	Maximum Element in Array	The array size can vary from 1 to 10000. The integers can range from -1000000 to 1000000.	Easy
12	Factorial Calculation	0≤n≤20	Easy
13	Character Replacement in String		Easy
14	Count Vowels and Consonants	1 <= \|s\| <= 10000	Easy
15	Bubble Sort Implementation	1 <= array length <= 1000 -10^6 <= array elements <= 10^6	Easy
16	Reverse Linked List		Easy
17	Quick Sort		Easy
1	Two Floating Point Numbers Average		Easy
18	Strong Number Checker	1 <= array length <= 10^5 -10^9 <= array elements <= 10^9	Medium
19	Merge Sorted Array	nums1.length == m + n nums2.length == n 0 <= m, n <= 200 1 <= m + n <= 200 -10^9 <= nums1[i], nums2[j] <= 10^9	Easy
20	String Compression	1 <= chars.length <= 2000	Easy
21	Find the Difference of Two Arrays		Easy
25	Delete the Middle Node of a Linked List		Easy
22	Unique Number of Occurrences		Easy
23	Determine if Two Strings Are Close		Medium
24	Removing Stars From a String		Medium
26	Write a class called MyRegex which will contain a string pattern. You need to write a regular expression and assign it to the pattern such that it can be used to validate an IP address. Use the following definition of an IP address:		Easy
27	Simple Bill Problem	The input list can contain between 2 and 1 0 5 10 5 integers. Each integer can be in the range of 0 0 to 1 0 9 10 9 .	Medium
28	time-conversion	All input times are valid	Easy
29	mini-max-sum		Easy
36	Check if Array is Sorted	The array size will not exceed 1000.	Easy
37	Find the Maximum Element in an Array	The array size will not exceed 1000.	Easy
39	Remove Duplicates from an Array	The array size will not exceed 1000.	Easy
38	Insert an Element into an Array	The array size will not exceed 1000	Easy
40	Find the Second Largest Element in an Array	The array size will not exceed 1000.	Medium
41	Merge Two Sorted Arrays		Medium
42	Find Maximum Occurrence Value	The array size will not exceed 1000. & The integer values in the array are non-negative.	Medium
43	Sum of Array Elements	The array size will not exceed 1000 elements.	Medium
2	Arithmetic Operations		Easy
3	Grade Classification		Easy
4	Maximum of Three Numbers	input integers:-2147483648 to 2147483647	Easy
5	Swap	The input integers should be within the range of typical 32-bit integers: -2147483648 to 2147483647	Easy
6	Leap Year Check		Easy
7	Reverse an Array	Maximum array size is 1000.	Easy
8	Prime Number	The integer will be a non-negative number.	Medium
9	Factorial Calculation		Easy
10	Conditional Rendering Days in month		Easy
11	even or odd		Easy
66	Compare Two Integers	Both integers should be within the range of int (-2,147,483,648 to 2,147,483,647).	Easy
67	Check Positive or Negative	The integer should be within the range of int.	Easy
68	Find the Largest of Two Numbers	Both numbers should be within the range of int	Easy
69	Determine Grade Using Switch Case	Input should be an integer from 1 to 5.	Easy
70	Check if Number is Divisible by 3 or 5	The integer should be within the range of int.	Easy
71	Find the Day of the Week	Input should be an integer from 1 to 7.	Easy
72	Find the Smallest of Three Numbers	All three integers should be within the range of int.	Easy
73	Determine the Number of Days in a Month	Input should be an integer from 1 to 12.	Easy
74	Calculate Absolute Value	The integer should be within the range of int.	Easy
75	Check if a Character is a Vowel or Consonant	The input should be a single character. The character can be either an uppercase or lowercase letter.	Easy
76	Check if Two Numbers are Equal	Both integers should be within the range of int.	Easy
77	Determine Character Type	The input should be a single character.	Easy
78	Simple Calculator Using Switch Case	Both numbers should be within the range of int. The operator should be one of +, -, *, /.	Easy
79	Convert Numerical Grade to Letter Grade Using Switch	The input should be an integer from 1 to 5.	Easy
80	Check if a Character is an Alphabet, Digit, or Special Character	The input should be a single character.	Easy
81	Print a Message	None.	Easy
82	Variable Assignment and Output	None.	Easy
84	Boolean Check	Input is an integer.	Easy
83	Addition of Two Floats	None.	Easy
85	Compare Two Floats	Input is two floats.	Easy
86	Check if a Character is Uppercase	Input is a single character.	Easy
87	Arithmetic Operations Using Functions	Inputs are two integers.	Easy
88	Square Root Calculation Using Math Functions	Input is a positive number.	Easy
89	Power Calculation Using Math Functions	Inputs are two positive numbers.	Easy
90	Modulus Operation	Inputs are two integers.	Easy
91	Check Odd or Even Using Functions	Input is an integer.	Easy
92	Calculate Compound Interest	Inputs are principal, rate, time, and number of times interest applied.	Easy
93	Sum of Digits Using Functions	Input is a non-negative integer.	Easy
94	Check Palindrome String	Input is a string.	Easy
95	Count Vowels in a String	Input is a string.	Easy
96	Sum and Average of an Array	Array size is between 1 and 100.	Easy
97	Find Maximum and Minimum in an Array	Array size is between 1 and 100.	Easy
98	Sort Array in Descending Order	Array size is between 1 and 100.	Easy
99	Matrix Multiplication	Matrices are 2D arrays of size 3x3.	Easy
100	Check Perfect Square	Input is a positive integer.	Easy
101	Check Armstrong Number	Input is a positive integer.	Easy
102	Decimal to Binary Conversion	Input is a positive integer.	Easy
103	Binary to Decimal Conversion	Input is a binary number.	Easy
104	Find Prime Numbers in a Range	Inputs are positive integers.	Easy
105	Check if a Number is a Perfect Number	Input is a positive integer.	Easy
106	Calculate GCD of Two Numbers	Inputs are positive integers.	Easy
107	Calculate LCM of Two Numbers	Inputs are positive integers.	Easy
108	Check if a Number is a Palindrome	Input is a positive integer.	Medium
109	Print Fibonacci Series	Input is a positive integer.	Easy
110	Calculate Sum of Fibonacci Series	Input is a positive integer.	Medium
111	Find Factorial of a Number Using Recursion	Input is a positive integer.	Medium
112	Calculate Power Using Recursion	Inputs are two positive integers.	Medium
113	Sum of Array Elements Using Recursion	Array size is between 1 and 100.	Easy
114	Reverse a String Using Recursion	Input is a string.	Easy
115	Calculate Sum of Digits Using Recursion	Input is a non-negative integer.	Easy
116	Calculate GCD Using Recursion	Inputs are positive integers.	Easy
117	Find Maximum Element Using Recursion	Array size is between 1 and 100.	Medium
118	Fibonacci Series Using Recursion	Input is a positive integer.	Easy
119	Check Prime Using Recursion	Input is a positive integer.	Easy
120	Count Digits Using Recursion	Input is a non-negative integer.	Easy
121	Check Palindrome Using Recursion	Input is a string.	Easy
122	Find Length of a String Using Recursion	Input is a string.	Easy
123	Print Array Elements Using Recursion	Array size is between 1 and 100.	Medium
124	Calculate Power of a Number Using Recursion	Inputs are two positive integers.	Medium
125	Find Largest Element in an Array Using Recursion	Array size is between 1 and 100.	Easy

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