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19
Task/Modular-inverse/Yabasic/modular-inverse.basic
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Task/Modular-inverse/Yabasic/modular-inverse.basic
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print multInv(42, 2017)
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end
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sub multInv(a,b)
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x0 = 0
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b0 = b
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multInv = 1
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if b = 1 return
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while a > 1
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q = a / b
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t = b
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b = mod (a, b)
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a = t
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t = x0
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x0 = multInv - q * x0
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multInv = int(t)
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wend
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if multInv < 0 return multInv + b0
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end sub
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