<garvit244>268_1.py
def missingNumber( nums):
    if not nums:
        return 0
    totalSum, n = sum(nums), len(nums)
    expectedSum = (n*(n+1))/2
    return expectedSum - totalSum
def sample_funcname ( var_0 ) :
    if not var_0 :
        return 0
    var_3 , var_5 = sum ( var_0 ) , len ( var_0 )
    var_8 = ( var_5 * ( var_5 + 1 ) ) / 2
    return var_8 - var_3
