Let a circle C:(x-h)^2+(y-k)^2=r^2, k>0, touch the x -axis at (1,0). If the line x+y=0 intersects the circle C at P and Q such that the length of the…

Let a circle $\displaystyle C:(x-h)^2+(y-k)^2=r^2, k>0$, touch the $\displaystyle x$-axis at $\displaystyle (1,0)$. If the line $\displaystyle x+y=0$ intersects the circle $\displaystyle C$ at $\displaystyle P$ and $\displaystyle Q$ such that the length of the chord $\displaystyle P Q$ is $\displaystyle 2$, then the value of $\displaystyle h+k+r$ is equal to \_\_\_\_.