87 lines
2.6 KiB
Python
87 lines
2.6 KiB
Python
#!/bin/python3
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import sys,time,re
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from sympy import symbols,solve,Eq
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from pprint import pprint
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sys.path.insert(0, '../../')
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from fred import list2int,get_re,nprint,lprint,loadFile
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start_time = time.time()
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input_f = 'input'
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# Both Part 1 and Part was solved the same way, but
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# after solving them, i tried to optimize the loader
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# on Part 1.
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# I left Part 2 as-is, to show how it was done first.
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#########################################
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# #
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# Part 1 #
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# #
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#########################################
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def part1():
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result = 0
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x,y = symbols('x y',integer=True)
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a_cost = 3
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b_cost = 1
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with open(input_f) as file:
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while (lines := list(file.readline() for _ in range(4))):
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match = re.findall(r"X[\+|=](\d+), Y[\+|=](\d+)","".join(lines).strip())
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match = [(int(x), int(y)) for x, y in match]
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if match:
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eq1 = Eq(match[0][0]*x + match[1][0]*y,match[2][0])
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eq2 = Eq(match[0][1]*x + match[1][1]*y,match[2][1])
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s = solve((eq1,eq2),(x,y))
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if s:
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result += s[x]*a_cost
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result += s[y]*b_cost
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else:
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break
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return result
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start_time = time.time()
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print('Part 1:',part1(), '\t\t', round((time.time() - start_time)*1000), 'ms')
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#########################################
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# #
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# Part 2 #
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# #
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#########################################
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def part2():
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instructions = []
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with open(input_f) as file:
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for line in file:
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match = get_re(r".*X[\+|=](\d+), Y[\+|=](\d+)",line.rstrip())
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if match:
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instructions.append(list2int([match.group(1),match.group(2)]))
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a_cost = 3
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b_cost = 1
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a = ()
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b = ()
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r = ()
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x,y = symbols('x y',integer=True)
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result = 0
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for idx, inst in enumerate(instructions):
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if idx%3 == 0:
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a = (inst[0],inst[1])
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elif idx%3 == 1:
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b = (inst[0],inst[1])
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elif idx%3 == 2:
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r = (inst[0]+10000000000000,inst[1]+10000000000000)
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eq1 = Eq(a[0]*x + b[0]*y,r[0])
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eq2 = Eq(a[1]*x + b[1]*y,r[1])
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s = solve((eq1,eq2),(x,y))
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if s:
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result += s[x]*a_cost
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result += s[y]*b_cost
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return result
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start_time = time.time()
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print('Part 2:',part2(), '\t\t', round((time.time() - start_time)*1000), 'ms') |