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tom_changeGreedy.py
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tom_changeGreedy.py
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# Greedy method for finding umber of arrays in
# Written by: Tom Gariepy
import sys
import os
import time
def chGreedy(array, total):
i = len(array) - 1
curTotal = total
countArr = [0] * len(array) #empty array for coin count
totCount = 0
while (curTotal > 0): #while our total is positive
if (array[i] <= curTotal): #if the largest coin value can be subtracted from our total
curTotal = curTotal - array[i] #subtracting the coin
countArr[i] = countArr[i] + 1 #updating our count array of coins
totCount = totCount + 1 #updating our total count of coins
else:
i = i - 1 #moving to the next coin in the coin array
return countArr, totCount
def prob6():
V = [1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30]
# A = 200000000
A = 20
outName = "greedyResults_prob6.csv"
with open(outName, 'wt') as resultFile:
resultFile.write("A,Greedy (Time),Greedy (coin)\n")
# while (A <= 2000000000):
while (A <= 30):
startTime = time.clock()
resArr, resCount = chGreedy(V, A)
endTime = time.clock()
totTime = endTime - startTime
print("A: " + str(A))
print("Time: " + str(totTime))
print("Answer: " + str(resCount))
resultFile.write(str(A) + "," + str(totTime) + "," + str(resCount) + "\n")
A = A + 1
# A = A + 200000000
def prob5():
V1 = [1, 2, 6, 12, 24, 48, 60]
V2 = [1, 6, 13, 37, 150]
# A = 200000000
A = 20
outName = "greedyResults_prob5.csv"
with open(outName, 'wt') as resultFile:
resultFile.write("A,Greedy (A1 Time),Greedy (A1 coin),Greedy (A2 Time),Greedy (A2 coin)\n")
# while (A <= 2000000000):
while (A <= 34):
# Getting A1 answers
startTime1 = time.clock()
resArr1, resCount1 = chGreedy(V1, A)
endTime1 = time.clock()
totTime1 = endTime1 - startTime1
# Getting A2 answers
startTime2 = time.clock()
resArr2, resCount2 = chGreedy(V2, A)
endTime2 = time.clock()
totTime2 = endTime2 - startTime2
print("A: " + str(A))
print("Time1: " + str(totTime1))
print("Answer1: " + str(resCount1))
print("Time2: " + str(totTime2))
print("Answer2: " + str(resCount2))
resultFile.write(str(A) + "," + str(totTime1) + "," + str(resCount1) + "," + str(totTime2) + "," + str(resCount2) + "\n")
A = A + 1
# A = A + 200000000
def prob4():
V = [1, 5, 10, 25, 50]
# A = 200000000
A = 20
outName = "greedyResults_prob4.csv"
with open(outName, 'wt') as resultFile:
resultFile.write("A,Greedy (Time),Greedy (coin)\n")
# while (A <= 2000000000):
while (A <= 55):
startTime = time.clock()
resArr, resCount = chGreedy(V, A)
endTime = time.clock()
totTime = endTime - startTime
print("A: " + str(A))
print("Time: " + str(totTime))
print("Answer: " + str(resCount))
resultFile.write(str(A) + "," + str(totTime) + "," + str(resCount) + "\n")
# A = A + 200000000
A = A + 5
def main():
if (len(sys.argv) == 2): #file i/o stuff checking for file
fName = sys.argv[1]
inName = fName + ".txt"
outName = fName + "change.txt"
fileCheck = os.path.isfile(inName)
if (fileCheck == False):
print("ERROR: " + inName + " not found.")
return 1
with open(outName, 'wt') as resultFile:
with open(inName, 'rt') as inputFile:
inData = inputFile.read().splitlines()
inArr = 0
inTot = 1
while (inArr < len(inData)): #Reading the file
curArray = inData[inArr]
curArray = curArray.replace('[', '') #getting rid of extra stuff
curArray = curArray.replace(']', '')
curArray = map(int, curArray.split(',')) #reading in the array , deleminated
curTotal = int(inData[inTot]) #amount desired
t0 = time.time()
retArr, retCount = chGreedy(curArray, curTotal) #calling our function
t1 = time.time()
totalTime = t1-t0
print("Time elapsed: " + totalTime)
print("Coin count: " + str(retArr))
print("Minimal coins: " + str(retCount))
resultFile.write(str(retArr) + "\n")
resultFile.write(str(retCount) + "\n")
inArr = inArr + 2
inTot = inTot + 2
else:
print("ERROR: incorrect amount of arguments")
if (len(sys.argv) == 2):
if (sys.argv[1] == "prob4"):
prob4()
elif (sys.argv[1] == "prob5"):
prob5()
elif (sys.argv[1] == "prob6"):
prob6()
else:
main()
else:
print("ERROR: incorrect amount of arguments")