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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Modular-inverse/FunL/modular-inverse.funl Normal file
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import integers.egcd
def modinv( a, m ) =
val (g, x, _) = egcd( a, m )
if g != 1 then error( a + ' and ' + m + ' not coprime' )
val res = x % m
if res < 0 then res + m else res
println( modinv(42, 2017) )