COSC - Homework 03

correct = ['D','B','C','A','C','D','A','C','C','B','D','A','B','D','C','D','C','D','C','A','B','D','C','B','A']
answers1 = ['A','B','C','A','B','D','A','A','C','B','D','A','D','C','C','B','C','D','B','A','D','D','C','C','A']
answers2 = ['D','A','C','A','B','D','A','C','C','B','D','A','B','D','A','D','C','D','C','A','B','C','C','B','A']

count1 = 0
count2 = 0 

for i in range(0,25):
    if(correct[i] == answers1[i]):
        count1 = count1 + 1
    if(correct[i] == answers2[i]):
        count2 = count2 + 1
        
grade1 = int ((count1 / 25) * 100)
grade2 = int ((count2 / 25) * 100)

print("Student 1 Grade: "+str(grade1)+"%")
print("Student 2 Grade: "+str(grade2)+"%")

quantaties = [84, 100, 126, 150, 186, 200, 216, 248]

for i in quantaties:
    if i <+ 100:
        cost = i * 350
    elif i <= 200: 
        cost = (100 * 350) + (i - 300) * 300
    elif i > 200:
        cost = (100 * 350) + (100 * 300) + (i - 200) * 250
print("The cost for an order of",i,"widgets is $" + str(cost)+'.')

balance = 1000
i = 0.05
pmt = 150
n = 0
while (balance > 0):
    n = n + 1
    balance = balance * (i + 1) - pmt
    round(balance,2)
    if (balance <= 0):
        final_pmt = balance + pmt
        print("The amount of the final payment will be",final_pmt)
        balance = 0
    else: 
        print("The balance at the end of the year",n,'is',balance)

def hailStoneSequence(n):
    ls = [n]
    while n != 1:
        if(n%2 == 0):
            n = n//2
            ls.append(n)
        else:
            n = n*3 + 1
            ls.append(n)
    return ls

hs15 = hailStoneSequence(15)
hs17 = hailStoneSequence(17)
hs22 = hailStoneSequence(22)

print('hs15: ')
for i in hs15:
    print(i,end = ' ')

print('\nhs17: ')
for i in hs17:
    print(i,end = ' ')

print('\nhs22: ')
for i in hs22:
    print(i,end = ' ')

print()#newline

r_pop = 1000
w_pop = 200
print(f"{'Year':10s}{'R_pop':8s}{'W_pop'}")
print(f"-"*24)
print(f"{0:<10d}{r_pop:<8d}{w_pop}")
r_pop,w_pop = 1100,220
print(f"{1:<10d}{r_pop:<8d}{w_pop}")
r_pop,w_pop = 1166, 249
print(f"{2:<10d}{r_pop:<8d}{w_pop}")
year = 2
while r_pop>0 and w_pop>0:
    r_pop_prev = r_pop
    w_pop_prev = w_pop
    r_pop = 1.5*r_pop_prev - 0.002*r_pop_prev*w_pop_prev
    w_pop = 0.8*w_pop_prev + 0.0003*r_pop_prev*w_pop_prev
    year = year+1
    print(f"{year:<10d}{round(r_pop):<8d}{round(w_pop)}")

x1 = 0
x2 = 5

def f(x):
    result =  x**3 - 4*(x**2) + 3*x - 4
    return result

val1 = f(x1)
val2 = f(x2)

n = 0

limit = 0.000001

while(abs(val1) > limit or abs(val2) > limit):
    n += 1
    new_x = (x1 + x2)/2
    new_val = f(new_x)
    if new_val < 0:
        x1 = new_x
        val1 = new_val
    else:
        x2 = new_x
        val2 = new_val

new_x = round(new_x,7)

print(f"The approximate solution is x = {new_x}.")
print(f"The algorithm took {n} iterations to converge.")

students = {
 146832:{'first':'Brendan', 'last':'Small'},
 147354:{'first':'Melissa', 'last':'Robbins'},
 149126:{'first':'Jason', 'last':'Penopolis'},
 149735:{'first':'Fenton', 'last':'Mulley'}
}
courses = {
 'ENGL 101':'Composition I',
 'ENGL 104':'Composition II',
 'MATH 117':'College Algebra',
 'MATH 151':'Calculus I',
 'CHEM 103':'General Chemistry I',
 'ECON 201':'Macroeconomics'
}
sid = [149126, 146832, 147354, 149735, 149126, 146832,
 146832, 149735, 149126, 147354, 147354, 149735]
cid = ['ENGL 101', 'MATH 117', 'ENGL 104', 'CHEM 103', 'MATH 117', 'ECON 201',
 'ENGL 101', 'ENGL 101', 'CHEM 103', 'ENGL 104', 'MATH 151', 'MATH 117']
grade = ['D', 'C', 'B', 'A', 'B', 'C',
 'A', 'F', 'B', 'A', 'A', 'C']

dash = '-' * 69

print("SID      First    Last      CID        Course Name        Grade")
print(dash)
for i in range (0,12):
    roll = sid[i]
    code = cid[i]
    print('{:<8d}{:<9s}{:<10s}{:<11s}{:<22s}{:<1s}'.format(sid[i],students[roll]['first'],students[roll]['last'],cid[i],courses[code],grade[i]))

prices = {'p101':37.52, 'p117':56.98, 'p122':43.72, 'p125':48.33, 'p126':52.45}
inventory = {
 'STL':{'p101':520, 'p117':315, 'p122':117, 'p125':258, 'p126':345},
 'CHI':{'p101':125, 'p117':864, 'p122':231, 'p125':612, 'p126':164},
 'KC' :{'p101':264, 'p117':285, 'p122':772, 'p125':467, 'p126':106}
}

total_inventory = {}
for key in prices.keys():
    quantity = 0
    for quant in inventory.values():
        quantity += quant.get(key)

    total_inventory[key] = quantity
    print(f'{key}:{quantity}')
total_value = 0
for key, price in prices.items():
    quantity = total_inventory.get(key)
    total_value += price * quantity
print(f'The total value of the inventory is ${total_value}')