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Résout une division euclidienne.

def diveuc(a, b): # a = dividende, b = diviseur
    q = 0
    if b == 0:
        raise ValueError("on ne peut pas diviser pas 0")
    elif a == 0:
        return (0, 0)
    elif a > 0 and b > 0:
        r = a
        while b <= r:
            r -= b
            q += 1
        return (q, r)
    elif a < 0 and b > 0:
        r = -a
        while b <= r:
            r -= b
            q -= 1
        if r != 0:
            q -= 1
            r = abs(r - b)
        return (q, r)
    elif a > 0 and b < 0:
        r = a
        while -b <= r:
            r -= -b
            q -= 1
        return (q, r)
    else:
        r = -a
        while -b <= r:
            r -= -b
            q += 1
        if r != 0:
            q += 1
            r = abs(r + b)
        return (q, r)
    
    
def diveuc_fraude(a, b):
    if b == 0:
        raise ValueError("on ne peut pas diviser pas 0")
    elif a == 0:
        return (0, 0)
    elif b > 0:
        return (a//b, a%b)
    elif b < 0:
        return ((a//b) + 1, (a%b) - b) if a%b != 0 else (a//b, a%b)