diff --git a/zhousi.py b/zhousi.py
new file mode 100644
index 0000000..86d3361
--- /dev/null
+++ b/zhousi.py
@@ -0,0 +1,83 @@
+#1
+p=input("")
+#代码开始
+y=""
+for i in p:
+    if '0'<= i <='9':
+        y=y+chr(ord('9')-ord(i)+ord('0'))
+    elif 'A'<=i<='Z':
+        y=y+chr(ord('Z')-ord(i)+ord('A'))
+    elif 'a'<=i<='z':
+        y=y+chr(ord('z')-ord(i)+ord('a'))
+#代码结束
+print(y)
+
+##2
+# import math
+# r=eval(input(""))
+# m=int(input(""))
+# n=int(input(""))
+# #开始
+# s=r*m/(1-math.pow(1+r, -n))
+# #结束
+# print("{:.2f}".format(s))
+
+## 3
+# sg=eval(input())
+# tz=eval(input())
+
+# BMI=tz/(sg**2)
+# if BMI<18.5:
+#     print("体重过低")
+# elif 18.5<=BMI<=24:
+#     print("体重正常")
+# elif 24<BMI<=28:
+#     print("体重超重")
+# else:
+#     print("体重肥胖")
+
+
+## 4
+# s=eval(input())
+# n=eval(input())
+# #开始
+# f=59
+# if s>800:
+#     f=f+(s-800)*0.1
+# if n>40:
+#     f=f+(n-40)*1
+ 
+# #结束
+# print("{:.2f}".format(f))
+
+
+
+# #结束
+
+## 5
+# y=eval(input())
+# #开始
+# n=1
+# zf=1
+# s=0
+# while 1/n>y:
+#     s+=1/n*zf
+#     n+=2
+#     zf*=-1
+# s=s*4
+
+# #结束
+# print("{:.4f}".format(s))
+
+
+
+
+## 6
+# ch=input("")
+# #开始
+# s=''
+# for i in range(ord('a'),(ord(ch)+1)):
+#     s+=chr(i)
+#     print(s)
+
+