Solution for ‘Set all the bits in given range of a number’ in GO.

Author@ Suras Kumar Nayak

Set all the bits in given range of a number

Question:

Given a non-negative number N and two values L and R. The problem is to set all the bits in the range L to R in the binary representation of N.

Constraints :

• 1<=T<=100
• 1<=N<=232
• 1<=L<=R<=32

Input:

The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case contains three integers N, L and R as input.

Output:

For each test case, set the bits in given range and print the modified number in new line.

Sample Test Case:

Input :

• 2
• 17 2 3
• 8 1 2

Output :

• 23
• 11

Explanation:

• Input : N = 17, L = 2, R = 3
• Output : 23
• (17)10 = (10001)2
• (23)10 = (10111)2
• The bits in the range 2 to 3 in the binary representation of 17 are set.

Solution

• Language Used: go

package main
import "fmt"
 
func main(){
	var t int
	fmt.Scan(&t)
	
	for j := 1; j <= t; j++ {
		
		var n int
		fmt.Scan(&n)
		
		var l int
		fmt.Scan(&l)
		
		var r int
		fmt.Scan(&r)
		
		fmt.Println(n|(((1 << uint(l - 1)) - 1) ^ ((1 << uint(r)) - 1))) 
	}
}