How To .

Java 1.8
OS Debian 9
Linux 4.9.0-8-amd64   

Compile the 3 source files

1. MinimumUniqueSum.java
2. SuperStack.java
3. CountingPairs.java

To run Question 1

1. java MinimumUniqueSum
2. Enter the no. of elements in the list
3. Enter each element followed by an <enter>

3
1
2
2

The above example shows 3 inputs

To run Question 2

1. java SuperStack
2. Enter the no. of operations
3. Type each operation in a new line. If invalid command is typed, the program terminated

5
push 4
push 3
pop
push 4
inc 2 1

To run Question 3

1. java CountingPairs
2. Enter no of elements in the list
3. Enter each element and the value of k as specified in the question.

6
1
1
2
2
3
3
1