Update homework_01.py

lession_4/homework_01.py

@@ -18,3 +18,23 @@ def convert(s, numRows):
 
 
 s = convert("PAYPALISHIRING", 4)
 s = convert("PAYPALISHIRING", 4)
 print(s)
 print(s)
+
+
+# def convert(s, numRows):
+#     if numRows == 1:
+#         return s
+
+#     l = [''] * numRows
+#     print(l)
+#     row,step = 0,1
+
+#     for c in s:
+#         if row == 0:
+#             step = 1
+#         if row == numRows - 1:
+#             step = -1
+#         l[row] += c
+#         row += step
+#     return ''.join(l)
+
+# print(convert('LEETCODEISHIRING', 3) )   # 预期输出 'LCIRETOESIIGEDHN'
\ No newline at end of file