提交第四次作业

4-homework-yanjun/convert.py

+#z字形变换
+'''
+L   C   I   R
+E T O E S I I G
+E   D   H   N
+
+'''
+def convert(s, numRows):
+
+    rows = [''] * numRows
+    #必须为False，否则数据越界，本来角标为len-1
+    isInc = False
+    curro = 0
+    for c in s:
+        rows[curro] += c
+        if curro == 0 or curro == numRows - 1:
+            isInc = not isInc
+        if isInc:
+            curro += 1
+        else:
+            curro -= 1
+    return ''.join(rows)
+
+print(convert("LEETCODEISHIRING",4))
+print(convert("LEETCODEISHIRING",3))
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