$${\begin{array}{l} \, \, \, 1 \, \, \, \, \, \,\, \, 2 \, \,\, \, \, \, \, 3\, \,\, \, \, \, \, 4\, \,\, \ldots \, 97\, \,\,\, 98\, \,\,\, 99\, \,\,\, 100 \\ \underline{100\, \,\, \,99\, \,\, \,98\, \,\, \, 97 \, \ldots \, \,\, 4 \,\,\, \, \, \, \,3\, \,\,\, \, \, \, 2\, \,\,\, \, \,\, \,1\, \,\,}\\101\, \,101 \, \,101 \, 101 \ldots 101 \,101\, 101 \, \,101 \end {array}}$$