Problem 2

Theme 2 Problems

Problems

1. Q1. Average (Easy)
2. Q2. Slope (Easy)
3. Q3. Root of Quadratic Equation (Easy)
4. Q4. Time to Second (Easy)
5. Q5. Sum of Digits (Medium)
6. Q6. Second to Time (Medium)
7. Q7. Sum of Odd (Hard)
8. Q8. Round (Hard)

Q1. Average (Easy)

Write a function average that returns the arithmetic mean (산술 평균) of two integers a and b

input parameter : two integers a and b
return value : the arithmetic mean of a and b

def average(a, b):
    # ADD ADDITIONAL CODE HERE!
    return

print(average(8, 2))        # 5.0
print(average(247, -893))   # -323.0
print(average(4628, 1241))  # 2934.5

Q2. Slope (Easy)

Write a function slope that returns the slope of the equation of a straight line (ax + by + c = 0)

input parameter : three integers a, b, c (a is not a zero)
return value : the float slope value

def slope(a, b, c):
    # ADD ADDITIONAL CODE HERE!
    return

print(slope(1, 1, 1))   # -1.0
print(slope(2, -3, -7)) # 1.5
print(slope(3, 0, 6))   # 0.0

Q3. Root of Quadratic Equation (Easy)

Write a function solve that returns any real root of given quadratic equation
(All of the quadratic equations given by inputs have at least one root)

input parameter : three integers a, b, c (ax² + bx + c = 0) (a is not a zero)
return value : any real root of quadratic equation

def solve(a, b, c):
    # ADD ADDITIONAL CODE HERE!
    return

print(solve(1,-4,4))    # 2.0
print(solve(1,-7,12))   # 3.0 or 4.0

Q4. Time to Second (Easy)

Write a function time2second:

input parameter : three integers hour, minute and second
return value : total second of the given time

def time2second(hour, minute , second):
    # ADD ADDITIONAL CODE HERE!
    return

print(time2second(1, 6, 32))    # 3992
print(time2second(5, 42, 3))    # 20523
print(time2second(15, 23, 39))  # 55419

Q5. Sum of Digits (Medium)

Write a function sum:

input parameter : an integer n where 1000 <= n <= 9999 (i.e. 4-digit integer)
return value : sum of digits

def sum(n):
    # ADD ADDITIONAL CODE HERE!
    return

print(sum(8271))    # 18
print(sum(1032))    # 6
print(sum(4100))    # 5

Q6. Second to Time (Medium)

Write a function second2time:

input parameter : an positive integer second
return value : string of that time (Hour : Minute : Second)

def second2time(second):
    # ADD ADDITIONAL CODE HERE!
    return

print(second2time(3992))     # 1:6:32
print(second2time(20523))   # 5:42:3
print(second2time(55419))   # 15:23:39

Q7. Sum of Odd (Hard)

Write a function oddSum:

input parameter : five positive integers x1, x2, x3, x4, x5
return value : sum of the odd numbers

• Do not use condition statements or other advanced concepts
  조건문 및 다른 상위 개념 없이 푸시오

def oddSum(x1, x2, x3, x4, x5):
    # ADD ADDITIONAL CODE HERE!
    return

print(oddSum(1,2,3,4,5))    # 9
print(oddSum(2,4,6,8,10))   # 0
print(oddSum(1,3,5,7,9))    # 25

Q8. Round (Hard)

Write a function round:

input parameter : an positive float n and an positive integer k
return value : number n rounded to the kth decimal place
(k번째 자리에서 반올림 된 숫자 n)

• Do not use condition statements or other advanced concepts
  조건문 및 다른 상위 개념 없이 푸시오

def round(n, k):
    # ADD ADDITIONAL CODE HERE!
    return

print(round(0.324, 3))  # 0.32
print(round(0.387, 2))  # 0.4
print(round(0.512, 1))  # 1.0