Add details to BIT problems (#184)

Author: spring1843

bit/README.md

@@ -50,9 +50,7 @@ Left shifting can be viewed as a multiplication operation by 2 raised to the pow
 ```Go
 package main
 
-import (
-	"fmt"
-)
+import "fmt"
 
 func main() {
 	fmt.Println(1 << 5)  // Prints 32. 1 * 2^5 = 32

bit/addition_without_operators_test.go

@@ -7,7 +7,9 @@ TestAdditionWithoutArithmeticOperators tests solution(s) with the following sign
 
 	func Add(x, y int) int
 
-Add x by y, two integers without using any arithmetic operators such as {+,-,/,*,++,--,+=,…}.
+Given two integers add them without using any arithmetic operators such as {+,-,/,*,++,--,+=,…}.
+
+For example given 2 and 3 return 5.
 */
 func TestAdditionWithoutArithmeticOperators(t *testing.T) {
 	tests := []struct {

bit/division_without_operators_test.go

@@ -7,7 +7,9 @@ TestDivision tests solution(s) with the following signature and problem descript
 
 	func Divide(x, y int) int
 
-Divide x by y, two integers without using the built-in `/` or `*` operators.
+Given two integers, divide them without using the built-in `/` or `*` operators.
+
+For example given 20 and 4 return 5.
 */
 func TestDivision(t *testing.T) {
 	tests := []struct {

bit/is_power_of_two_test.go

@@ -7,7 +7,9 @@ TestIsPowerOfTwo tests solution(s) with the following signature and problem desc
 
 	func IsPowerOfTwo(input int) bool
 
-Using bit manipulation, return true if a given number like 2 and false otherwise.
+Using bit manipulation, return true if a given number is a power of 2 and false otherwise.
+
+For example given 20 return false. Given 256 return true because 2 ^ 8 = 256.
 */
 func TestIsPowerOfTwo(t *testing.T) {
 	tests := []struct {

bit/max_without_comparison_operators_test.go

@@ -7,8 +7,10 @@ TestMax tests solution(s) with the following signature and problem description:
 
 	func Max(x, y int) int
 
-Write max, a function that returns the largest of two numbers without using a
-any of the comparison operators such as {if, switch,…}.
+Given two integers, return the larger of the two without using any comparison
+operations like {if, switch,…}.
+
+For example given 20 and 2 return 20.
 */
 func TestMax(t *testing.T) {
 	tests := []struct {

bit/middle_without_division_test.go

@@ -7,8 +7,10 @@ TestMiddleWithoutDivision tests solution(s) with the following signature and pro
 
 	func MiddleWithoutDivision(min, max int)
 
-Given two integers min and max like `1` and `5`, return an integer like `3` that is in
-the middle of the two.
+Given two integers return the integer that is in the middle of the two integers without
+using any arithmetic operators such as {+,-,/,*,++,--,+=,…}.
+
+For example given 1 and 5, return 3. This is because 3 is in the middle of integers 1 to 5.
 */
 func TestMiddleWithoutDivision(t *testing.T) {
 	tests := []struct {

bit/oddly_repeated_number_test.go

@@ -7,8 +7,10 @@ TestOddlyRepeatedNumber tests solution(s) with the following signature and probl
 
 	func OddlyRepeatedNumber(list []int) int
 
-Given an array of integers that are all repeated an even number of times except one,
+Given a slice of integers that are all repeated an even number of times except one,
 find the oddly repeated element.
+
+For example given {1, 2, 2, 3, 3} return 1. Given {1, 2, 1, 2, 3} return 3.
 */
 func TestOddlyRepeatedNumber(t *testing.T) {
 	tests := []struct {