P,Q,A=map(int,input().split())

if P<=Q:
    if A>0:
        print(10**9)
    else:
        NG=0
        OK=10**9+1

        while OK-NG>1:
            mid=(OK+NG)//2

            if (100+P)*mid//100<(100+Q)*mid//100+A:
                OK=mid
            else:
                NG=mid

        SA=0
        for i in range(max(1,mid-10**5),min(mid+10**5,10**9+1)):
            if i<=NG and (100+P)*i//100<(100+Q)*i//100+A:
                SA+=1
            elif i>NG and (100+P)*i//100>=(100+Q)*i//100+A:
                SA-=1
            
        print(10**9-NG+SA)

else:
    OK=0
    NG=10**9+1

    while NG-OK>1:
        mid=(OK+NG)//2

        if (100+P)*mid//100<(100+Q)*mid//100+A:
            OK=mid
        else:
            NG=mid

    SA=0
    for i in range(max(1,mid-10**5),min(mid+10**5,10**9+1)):
        if i<=OK and (100+P)*i//100>=(100+Q)*i//100+A:
            SA-=1
        elif i>OK and (100+P)*i//100<(100+Q)*i//100+A:
            SA+=1
        
    print(OK+SA)