  Permutation statistics $\wnm$ and $\rlm$ are both arising from permutation
tableaux. $\wnm$ was introduced by Chen and Zhou, which was proved equally
distributed with the number of unrestricted rows of a permutation tableau.
While $\rlm$ is showed by Nadeau equally distributed with the number of $1$'s
in the first row of a permutation tableau.
  In this paper, we investigate the joint distribution of $\wnm$ and $\rlm$.
Statistic $(\rlm,\wnm,\rlmin,\des,(\underline{321}))$ is shown equally
distributed with $(\rlm,\rlmin,\wnm,\des,(\underline{321}))$ on $S_n$. Then the
generating function of $(\rlm,\wnm)$ follows. An involution is constructed to
explain the symmetric property of the generating function. Also, we study the
triple statistic $(\wnm,\rlm,\asc)$, which is shown to be equally distributed
with $(\rlmax-1,\rlmin,\asc)$ as studied by Josuat-Verg$\grave{e}$s. The main
method we adopt throughout the paper is constructing bijections based on a
block decomposition of permutations.
