AY2019/20 Semester 1
Miscellaneous - Practice Exercises

These are ungraded practice exercises for your own attempt. They are mounted on CodeCrunch, with number of submissions set to 99.

If you have any queries on these exercises, please post them on the appropriate LumiNUS or Telegram chatroom.

Set No.	Prob. No.	Directory	Zip	Task description	Reference	Objectives	Week of release (Mon, 8am)
1	1			Freezer Temperature	Unit 4 Ex#5	C basics	3
1	2			Freezer Temperature (version 2)	Unit 4 Ex#6	C basics, math function	3
2	1			Speed of Sound	Unit 5	Writing function, using math function	4
2	2			Magic Number	Unit 5	Writing function	4
2	3			NRIC Check Code	Unit 6	Selection statement (switch)	4
2	4			Taxi Fare	Unit 6	Selection statement (if-else)	4
2	5			Ascending Hundreds-digits of 3 Integers	Unit 6	Selection statement, logical operator	4
2	6			Days Since 1 Jan 2016	Unit 6	Selection statement (switch)	4
2	7			Ordinal Suffix	Unit 6	Selection statement	4
3	1			Prime Number	Unit 6	Repetition statement	4
3	2			Input Data Validation	Unit 6	Repetition statement	4
3	3			Count Input Values	Unit 6	Repetition statement, scanf()	4
3	4			Count number of primes	Unit 6	Repetition statement	4
3	5			Count numbers not divisible by 2 divisors	Unit 6	Repetition statement	4
3	6			Count pairs of coprime numbers	Unit 6	Repetition statement	4
3	7			Multiples of 5 or 7	Units 5,6	Revision: Function, repetition and selection statements	4
3	8			Perfect Number	Units 5,6	Revision: Function, repetition and selection statements	4
3	9			Increasing Order	Units 5,6	Revision: Repetition and selection statements	4
4	1			Which Century?		Past year PE1 question	5
4	2			Who Are the Winners?		Past year PE1 question	5
4	3			Computing SAT and IQ Scores		Past year PE1 question	5
4	4			Identifying Undergrad Cards		Past year PE1 question	5
4	5			Tray and Slabs		Past year PE1 question	5
4	6			Parking Fee		Past year PE1 question	5
4	7			Happy Number		Past year PE1 question	5
5	1			Pointers	Unit 7	Pointers	5
5	2			Set Containment	Unit 8	Array	5
5	3			Rabbit Jumps	Unit 8	Array	5
5	4			Partition	Unit 8	Array	5
5	5			Pie	Unit 8	Array	5
5	6			Pie (Speed Challenge!)	Unit 8	Array	5
5	7			Sound Processing I: Echo	Unit 8	Array	5
5	8			Sound Processing II: Speed Change	Unit 8	Array	5
6	1			Matrix Multiplication	Unit 9	2D array	6
6	2			Valid Path	Unit 9	2D array	6
6	3			Diagonal Matrix and Upper Triangular Matrix	Unit 9	2D array	6
6	4			Magic Square	Unit 9	2D array	6
6	5			Friendship Relations	Unit 9	2D array	6
6	6			Pyramid	Unit 9	2D array	6
6	7			Image Processing I: Flipping	Unit 9	2D array	6
6	8			Image Processing II: Rotation	Unit 9	2D array	6
-	-			Starry Starry Night	Unit 13	Separate Compilation (Note that you must name your programs correctly as there are more than one file required for this exercise.)	7
7	1			Triangle Centroid	Unit 4	Function with pointer parameters	8
7	2			Arithmetic Mean and Geometric Mean	Unit 14	Function with pointer parameters	8
7	3			Surface Area and Volume	Unit 14	Function with pointer parameters	8
7	4			Find Pair	Units 8,14	Array, function with pointer parameters	8
7	5			Hourglass	Unit 14	Function with pointer parameters, problem solving	8
7	6			Triangle Incenter	Unit 14	Function with pointer parameters	8
7	7			Flood!	Units 9,14	2D array, function with pointer parameters	8
8	1			Summing Digit Characters	Unit 16	Character functions	9
8	2			Count Number of Words	Unit 16	Character functions	9
8	3			Count String in a Text	Unit 16	String functions	9
8	4			Palindrome	Unit 16	String functions	9
8	5			Pig Latin	Unit 16	String	9
8	6			Minesweeper	Units 9,16	2D array, string	9
8	7			InfoSec and Cryptography I: ROT-13	Unit 16	Characters and Strings	9
8	8			InfoSec and Cryptography II: Transposition	Units 9,16	2D array, Characters and Strings	9
9	1			Change NUSNET Password	Unit 16	Past year PE2 question	10
9	2			Poker Game	Unit 8	Past year PE2 question	10
9	3			Name Compatibility	Unit 16	Past year PE2 question	10
9	4			Most Frequent Letter n-gram	Unit 16	Past year PE2 question	10
9	5			2048 Game	Unit 9	Past year PE2 question	10
10	1			Sum Digits in an Integer	Unit 17	Recursion	10
10	2			Sum Array	Units 17,8	Recursion, array	10
10	3			Largest Digit Pair	Unit 17	Recursion	10
10	4			North-East Paths	Unit 17	Recursion	10
10	5			Christmas Presents	Unit 17	Recursion	10
10	6			Reverse Array	Units 17,8	Recursion	10
11	1			Points	Units 8,15	Array of structures	11
11	2			Health Screen	Units 8,15	Array of structures	11
11	3			Tiles	Units 8,15	Array of structures	11
11	4			CAP	Unit 15	Structures	11
11	5			Class Schedule	Units 8,15	Array of structures	11
12	1			Points and Lines	Revision	Sorting	12
12	2			Module Sorting	Revision	Sorting	12
12	3			Anagrams	Revision	Sorting	12
12	4			Search for 2D Pattern	Revision	Searching, 2D array	12
12	5			Prize	Revision	Structures, searching and sorting	12
12	6			Pixels	Revision	Array, searching and sorting	12
12	7			Pixels (Speed Challenge!)	Revision	Array, searching and sorting	12
12	8			Database I: Database Queries	Revision	Structures, searching and sorting	12
12	9			Database II: Database Operations	Revision	Structures, searching and sorting	12