32. Let $a_{1}, a_{2}, a_{3}, \cdots, a_{n}$ be positive real numbers, satisfying $a_{1}+a_{2}+a_{3}+\cdots+a_{n} \leqslant \frac{n}{2}$, find the minimum value of $A=$ $\sqrt{a_{1}^{2}+\frac{1}{a_{2}^{2}}}+\sqrt{a_{2}^{2}+\frac{1}{a_{3}^{2}}}+\cdots+\sqrt{a_{n}^{2}+\frac{1}{a_{1}^{2}}}$. (2008 Moldova National Training Team Problem)