ADDITIONAL TASKS FROM THE TOPIC - DATA AND DATA TYPES (C, C++, JAVA)

In this section, examples of tasks from the field of data and operators, with solutions, are given. Try to solve the examples on your own, and use the solution for checking or use it if, after a large number of attempts and a lot of effort, you still fail to solve the task on your own.
The solution will be displayed by clicking the button next to the assigned task.
The tasks are colored in different colors depending on the difficulty:

Green - easy tasks
Yellow - tasks of medium difficulty
Red - more difficult tasks

Task 1-Picture frames:

On the table there are picture frames of different dimensions, but they are all rectangular in shape. Based on the given width and height of the frame in millimeters, the program should determine the area of the frame in square millimeters.

Input:
One line of standard input contains two integer values X and Y (X≤300, Y≤300) representing the width and height of the image frame expressed in millimeters.

Output
One integer representing the area of the frame in square millimeters and one real number representing the area of the frame in square centimeters.

Example
Input
456 785
Output:
357960 3579.60

Solution

Task 2-Group of workers:

n workers do the job in s hours. Write a program that determines how many hours the work will be completed if more are added
m of workers?

Input
The three lines of the standard input respectively contain the natural number n, the real number s and the natural number m.

Output
One real number, rounded to two decimal places, representing the number of hours required to complete the job if more are added
m workers to the initial number of n workers.

Example
Input
1
3
1
Output
1.5

Solution

Task 3-Body movement:

The body begins to move from rest with a constant acceleration of a(m/s2).
What is its speed after time t(s) 5s>t>30s
How far does he travel in this time?

Input
The two lines of the standard input respectively contain the acceleration a in m/s2 and the time t in seconds.

Output
Two real numbers, rounded to two decimal places, representing the speed in m/s and the distance traveled in meters.
Apply the format given in the example.

Example
Input
2
20

Output
v=40 m/s
s=400m

Rešenje

Task 4-Exchanging digits:

Write a program that exchanges the units digit and the hundreds digit in a given natural number.
For a number with less than three digits, we consider the missing digits equal to 0.

Input
The first line of standard input contains a natural number.

Output
The number obtained after exchanging the units digit and the hundreds digit.

Example
Input
2349
Output
2943

Solution

Task 5-Middle of the interval:

There are houses in one long street. All houses in the street are marked with natural numbers. Ana lives in house number a, and Boris lives behind her, in house number b. Viktor lives in a house right in the middle between Anna and Boris. Write a program that determines the number of the house where Viktor lives (if there is an even number of houses between Anna and Boris, Viktor lives in the one closer to Anna).
Input:
Two integers are entered from the standard input:

a (0≤a≤2⋅10⁹) - the number of the house where Ana lives
b (a+2≤b≤2⋅10⁹) - the number of the house where Boris lives

Output:
Print one whole number on the standard output - the number of the house where Victor lives.
Example 1
Input
432457
562321

Output
497389

Example 2
Input
2
9
Output
5

Solution

Example 3
Input
2000000000
1999999998

Output
1999999999

Task 6-Operations by module:

Write a program that determines the last three digits of the sum and the last three digits of the product of four input integers.
Input:
In each line of the standard input, one integer from the interval [1..999][1..999] is entered.

Output:
The number determined by the last three digits of the sum and the number determined by the last three digits of the product of the entered numbers are printed on the standard output (any leading zeros do not need to be printed).

Example 1
Input
999
999
999
999

Output
996
1

Solution

Task 7-Distance of points:

Write a program that calculates and prints the distance between points given their coordinates.

Input
Four real numbers are entered from the standard input, each in a separate line. The first two numbers Ax and Ay represent the coordinates of the point A=(Ax,Ay), while the second two numbers Bx and By represent the coordinates of the point B=(Bx,By).

Output
Print a real number representing the distance between points A and B, rounded to five decimal places, on the standard output.

Example
Input
0
0
1
1

Output
1.41421

Solution

Task 8-Product of the digits of a three-digit number:

Enter a three-digit number and then determine the product of the digits of that number

Solution

9. Converting an angle

An angle is given in degrees to two decimal places. Write a program that expresses the given angle in degrees and minutes. For example, represent 60.25 as 60 degrees and 15 minutes.

Solution

10. Time conversion

Load time in seconds and print in hh:mm:ss format

Solution

11. Travel

The family went on vacation by car. By car, they have to cover kilometers moving at a constant speed of v[km/h]. Write a program that determines how many kilometers will be covered in t hours.

Input
The first line of the standard input contains the real value v, and the next line the real value s, which respectively represent the speed expressed in km/h and the planned distance traveled in kilometers.

Output
One real number rounded to two decimal places representing the required time in hours.
Example
Input
60
1050

Output
17.50

Source: Loop, Arithmetic.Formulae.Motion

Solution-video

12. Distance between houses

Pera and Mika live in the same street, Mika's house is further from the school. They go to school the same way, leave home at the same time and move evenly. Pera moves with speed v1m/s, and Mika moves with speed v2m/s (v2>v1). Write a program that determines the distance between their houses, if after t seconds Mika was d meters behind Pera.
Entrance
Four real numbers are entered which respectively represent Pera's movement speed (v1), Mika's movement speed (v2), the speeds are expressed in m/s, the number of seconds (t) and the distance between Pera and Mika in meters (d). Each piece of data is in a separate line of standard input.
Exit
On the standard output, display a real number, to two decimal places, that represents the distance between their houses.
Example
Entrance
1.6
2.1
10
30.0
Exit
35.00
Source: petlja.org/biblioteka/r/problemi/Zbirka-stara/rastojanje_kuca