program main
    implicit none
    integer*8::a,b,c,ans
    read(*,*)a,b,c
    ans=c/(a+b-1)*a
    c=c-c/(a+b-1)*(a+b-1)
    if(c<=a-1)then
        ans=ans+c
    else
        ans=ans+a
    end if
    print*,ans
end program