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 int((1+P/100)*mid)<int((1+Q/100)*mid):
                OK=mid
            else:
                NG=mid

        SA=0
        for i in range(max(1,mid-10**4),min(mid+10**4,10**9+1)):
            if i<=NG and int((1+P/100)*i)<int((1+Q/100)*i):
                SA+=1
            elif i>NG and int((1+P/100)*i)>=int((1+Q/100)*i):
                SA-=1
            
        print(10**9-NG+SA)

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

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

        if int((1+P/100)*mid)<int((1+Q/100)*mid)+A:
            OK=mid
        else:
            NG=mid

    SA=0
    for i in range(max(1,mid-10**4),min(mid+10**4,10**9+1)):
        if i<=OK and int((1+P/100)*i)>=int((1+Q/100)*i)+A:
            SA-=1
        elif i>OK and int((1+P/100)*i)<int((1+Q/100)*i)+A:
            SA+=1
        
    print(OK+SA)