8521. Conditional statement - 2

 

Find the value of y according to the following condition:

Input. One integer x (-104 ≤ x ≤ 104).

 

Output. Print the value of y according to the given condition.

 

Sample input 1

Sample output 1

2

4

 

 

Sample input 2

Sample output 2

20

8100

 

 

SOLUTION

conditional statement

 

Algorithm analysis

Use a conditional statement to solve the problem. Since x ≤ 10000 = 104, then x3 ≤ 1012. Let’s use the long long type to avoid overflow.

 

Algorithm implementation

Read the input value of x.

 

scanf("%lld",&x);

 

Compute the value of y.

 

if (x >= 10)

  y = x * x * x + 5 * x;

else

  y = x * x – 2 * x + 4;

 

Print the result.

 

printf("%lld\n",y);

 

Algorithm implementation – ternary operator

Read the input value of x.

 

scanf("%lld",&x);

 

Compute the value of y.

 

y = (x >= 10) ? x * x * x + 5 * x : x * x – 2 * x + 4;

 

Print the result.

 

printf("%lld\n",y);

 

Java implementation

 

import java.util.*;

 

public class Main

{

  public static void main(String[] args)

  {

    Scanner con = new Scanner(System.in);

    long y, x = con.nextLong();

    if (x >= 10)

      y = x*x*x + 5*x;

    else

      y = x*x - 2*x + 4;

    System.out.println(y);

    con.close();

  }

}

 

Python implementation

Read the input value of x.

 

x = int(input())

 

Compute the value of y.

 

if x >= 10:

  y = x * x * x + 5 * x

else:

  y = x * x - 2 * x + 4

 

Print the result.

 

print(y)