Set bits from ‘l’ to ‘r’ in Go

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 TestCase

Input :

2 17 2 3 8 1 2

Output :

23 11

Explaination :

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, l, r int
		fmt.Scan(&n)
		fmt.Scan(&l)
		fmt.Scan(&r)
		fmt.Println(n|(((1 << uint(l - 1)) - 1) ^ ((1 << uint(r)) - 1))) 
	}
}