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day03.py
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day03.py
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def inputToArray(input):
rv=[]
for row in input:
therow = []
for s in row:
therow.append(s)
print(s)
rv.append(therow)
return rv
def isSymbol(s):
assert s.isdigit() == False
return s != '.'
class symbol:
def __init__(self,x,y,sym):
self.x=x
self.y=y
self.sym=sym
class number:
width = 10
length = 10
def addTup(self,tup):
print(f"trying to add {tup}")
if tup[0]>=0 and tup[1]>=0 and tup[0]<number.width and tup[1]<number.length:
self.box[tup]=True
def boundryBox(self):
self.box={}
for i in range(self.x-1,self.xe+2):
tup=(i,self.y-1)
self.addTup(tup)
tup=(i,self.y+1)
self.addTup(tup)
tup=(self.x-1,self.y)
self.addTup(tup)
tup=(self.xe+1,self.y)
self.addTup(tup)
def __init__(self,number,x,y):
self.number=number
self.x=x
self.y=y
self.xe=x+len(str(number))-1
self.boundryBox()
def borders(self, a_symbol):
return self.box.get((a_symbol.x,a_symbol.y),False)
def processRow(input,y):
numbers = []
symbols = []
nm = False
ns = ''
nstart = -1
for i in range(0,len(input)):
s = input[i]
if s.isdigit():
if not nm:
nstart = i
ns=ns+s
nm = True
elif isSymbol(s):
sym = symbol(i,y,s)
symbols.append(sym)
if nm:
num = number(int(ns),nstart,y)
numbers.append(num)
nm = False
ns = ''
elif nm:
num = number(int(ns),nstart,y)
numbers.append(num)
nm = False
ns = ''
if nm:
num = number(int(ns),nstart,y)
numbers.append(num)
return symbols, numbers
def processBlock(input):
number.width = len(input[0].strip())
number.length = len(input)
y=0
symbols = []
numbers = []
for line in input:
s,n = processRow(line.strip(),y)
symbols = symbols + s
numbers = numbers + n
y=y+1
return symbols, numbers
def findAdjacentNumbers(symbols, numbers):
rv = []
for anumber in numbers:
c = 0
for asymbol in symbols:
if anumber.borders(asymbol):
c = c + 1
if c == 1:
rv.append(anumber.number)
print(f"Part Number {anumber.number}")
return rv
def findAndSum(input):
symbols,numbers = processBlock(input)
partNumbers = findAdjacentNumbers(symbols,numbers)
dedup = list(dict.fromkeys(partNumbers))
answer = sum(partNumbers)
return answer, sum(dedup)
def findGearSymbols(symbols):
newlist = [x for x in symbols if x.sym == '*']
return newlist
def findGears(symbols, numbers):
gears = findGearSymbols(symbols)
ratios = []
for gear in gears:
nums = []
for anumber in numbers:
if anumber.borders(gear):
nums.append(anumber)
if len(nums) == 2:
ratios.append(nums[0].number * nums[1].number)
return sum(ratios)
def findAndSumGears(lines):
symbols,numbers = processBlock(lines)
answer = findGears(symbols, numbers)
return answer
def compute():
text_file = open("data/input_day03.txt", "r")
lines = text_file.readlines()
print(lines)
print(len(lines))
text_file.close()
answer,dd = findAndSum(lines)
print(f"Day 3 Answer is {answer} or dedups {dd}")
answer = findAndSumGears(lines)
print(f"Part 2 answer = {answer}")
compute()