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24 lines
589 B
24 lines
589 B
from math import pow, ceil, floor
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lines = [l.split() for l in open("input.txt", 'r').read().splitlines()]
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races = [(int(lines[0][i]), int(lines[1][i])) for i in range(1,len(lines[0]))]
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#[(time, record)]
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#d = t * v
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#charge + t = time
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#t = time - charge
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#v = charge
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#d = (time - charge) * charge
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#d = -charge^2 + time*charge
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summa = 1
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for race in races:
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a = -1
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b = race[0]
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c = -race[1]
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rangeStart = floor((-b + pow((pow(b,2)-(4*a*c)),0.5)) / (2*a)) + 1
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rangeEnd = ceil((-b - pow((pow(b,2)-(4*a*c)),0.5)) / (2*a)) - 1
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summa *= (rangeEnd-rangeStart+1)
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print(summa) |