[Moderate] interview questions #7

[rygh4775]

Number Max: Write a method that finds the maximum of two numbers. You should not use if-else or any other comparison operator

[RoyMoon]

Approach 1 : use if

def getMaxNum(num1:int, num2:int) -> int:
    if num1-num2 < 0 : 
      return num2
   else:
      return num1

Approach 2 : use sign info

def getMaxNum(num1:int, num2:int) -> int:
    sign = isMinus(num1-num2)
    return (sign^1)*num1 + sign*num2

def isMinus(num : int) -> int:
    return num >> 31 & 0x1

print (getMaxNum(1,2))
print (getMaxNum(1000,1000))
print (getMaxNum(99,100))
print (getMaxNum(-1,1))
print (getMaxNum(-100,0))

output 2 1000 100 1 0